I missed out on nominations for the second half of the last round, so I'll give my two cents on B- and C+ in a couple of big posts. Will neaten up later. Also, could somebody tell me how to create those tab things in a post? Just so my nominations don't take up half the fucking thread page lol. Would be much appreciated!
So...
B- Rank
Alomomola:
Keep in B-, possibly drop to C+
I see no reason to raise Alom, and am leaning towards it dropping. The main reason for this is the fact that threats like SD Tox Orb Breloom, NP Thundurus, NastyPass Celebi etc are super common atm because Megabro's spinning around, and many of those same threats put massive pressure on Alom - especially within Stall - as they can either straight KO her or pivot with Volt Switch. From what I've seen in recent matches, she often forfeits a lot of momentum. Team slots on Stall are more valuable than ever, as it's pretty much become a game of packing multiple things that act as checks / counters to whatever threatens your win conditions (namely Megabro and Mega Sableye). So yeah, I'd say keep in B- for now but maybe drop based on what other people think.
Azelf:
Not sure, possible raise?
I don't really have any experience with Azelf in OU, but I know some people proclaim it's the best lead since sliced bread in the current meta. Great speed tier and a great movepool (Rocks Screens, Taunt, fantastic coverage and, of course, Explosion) make it a fantastic lead for Offense. Choice sets are also viable and unexpected, and can provide a Greninja check. That's something we could always do with (cry). I'd love to hear some thoughts from people who have more experience using it, but I'll stay undecided for now.
Conkledurr:
Raise to B
Conk is making a bit of a comeback atm. I remember the start of gen 6, when Conk was literally ubiquitous in the meta. He kind of died down because of Talonflame and Azumarills' dominating presences and everybody seemed to forget about him. At the moment though, he's really strong, and a lot of people just don't expect him and therefore don't really prepare much for him. I've done some testing with Poison Jab over Ice Punch and it works a treat. Yes, Lando-T is super common, but hitting it with a Knock Off on the switch is always nice to remove a potential scarf, and screwing over Fairy switch-ins like Azu, Sylveon and Mega Alt is a very welcome thing indeed. I've heard that Sheer Force and Guts sets are also pretty powerful on the right teams but again I don't have experience using them. Also, with Mega Sableye running around on 9/10 Stall teams and loads of new fast, physical megas testing out the meta, burns are all over the place, so Conk can pick up a boost, or deter a Will-o more easily than ever before. Finally, Conk can check Ninja really, really well, and threatens the Mach Punch or straight Knock Off bop on the switch. Definite raise imo.
Cresselia:
Raise to B
A fanstastic tool for Balance and Stall. Greninja is such a defining force in the metagame, and Cress isn't even 2HKO'd by LO Dark Pulse and can heal up with Moonlight whilst wearing it down. The ever-mentioned prevalence of Lando-T also allows Cress some EQ switch-ins, especially on scarfed variants. Healing Wish is great for bringing back so many of the fast 'n' frail threats ORAS introduced (Mega Lop, Mega Scep, Mega Beedril etc), or even bulky ones that attract burns (Mega Metagross), which can be achieved with Heal Bell too. Cress is also a powerful tool for Trick Room teams. I know a lot of people will find that a laughable reason to warrant a raise, but well built TR teams are reallllly strong in the metagame atm because of the speed creep. And anything that can set up TR in the face of Ninja should be seriously considered.
Doublade:
Drop to C+ or C
Doublade was a niche pick for stall teams in XY, and it's even more niche now. It provided a good stop to Mega Gardevoir, Mega Heracross and Mega Medicham simultaneously, and could also check Mega Pinsir but now that the mega pool has been so thouroughly diluted, and these Megas aren't at the top of the pile anymore, Doublade finds itself pretty far outside of its comfort zone. I'm sure it'll still find use on some hipster Stall teams, but it doesn't deserve to be anywhere near the B ranks imo.
Empoleon:
Keep in B-
Same as at the start of the ORAS meta. Provides one of the strongest Ninja checks without being passive, and can be used to scout for Low Kick. Has a unique defensive typing that synergises well with a load of threats, can fish for Scald burns pretty ruthlessly, can set up SR and phase... however, its role hasn't changed at all since the ORAS release. I could see it dropping over time, as it gets slammed hard by pretty much all the top threats that aren't non-LK Ninja. I'd say keep it where it is for now and see how the metagame changes around it. If Ninja gets banned it'll probably drop imo.

Garchomp (Mega):
Keep in B-
Megachomp's role also hasn't really changed and it still finds itself being pretty much outclassed by Vanillachomp. People can argue that it should drop because of speed creep etc but it doesn't really need to be outspeeding any of the new threats, so I would argue it's largely unaffected by it. It's still a damn powerful wallbreaker that's hard to switch into. Good on certain teams, but still overlooked, and bears a pretty crushing opportunity cost alongside the other, earth-shattering Megas. I'd say still a shitty choice, but too powerful to be lowered. Would love to hear other opinions.
Gothitelle
: Keep in B-
This is a toughie. On the one hand, Stall teams are fairly prevalent atm, and trapping is as useful as ever partly as a result. However, there's been a big rise in the usage of Shed Shell to combat this, and Gothitelle also loses against both Mega Sableye and Megabro, basically awarding them free setup opportunities. I'd say keep it where it is, as it's definitely still something to watch out for, but Stall has some new ways to deal with it.
Houndoom (Mega):
Raise to B or B+
I've used Megadoom on a couple of teams, and can only vouch for what everybody else has already said. It matches up so well vs so many threats. Lando-T and Rotom-W are still everywhere though, which is annoying, but pressuring Mega Sableye and Megabro simultaneously is awesome. Definite raise.

Klefki
: Raise to B+
Pretty much the definition of a useful tool. Performs on the same utilitarian level as Thundurus-I, and is basically the go-to T-Wave spammer now. Has excellent defensive typing too (I saw Magnet Rise mentioned earlier. It's oh so trolly) which lets it perform its job just that much better. Obviously still lower than Thundy because it lacks any kind of threatening offensive presence, but it's such a sick support choice and definitely deserves a big raise.

Lucario:
Keep in B-
I never see Luke anymore above like 1200.However, I really don't feel it's bad enough to drop, it just gets badly overlooked. I wonder if its popularity is still at a low after MegaLuke got banned ages ago, and people just forgot how good the original was, but it still has some serious mid-late game cleaning potential, and strong priority has literally never been more useful.

Scolipede:
Raise to Bor B+
Scolipede is such a powerful tool for offense. It basically holds the top spot as best Quickpasser alongside NP Celebi, and Quickpassing is really strong atm, being able to break down teams and provide momentum all in one go. In my opinion, the best Scolipede set atm is the Sash Hazards + Endeavour set, which just applies craaazy amounts of pressure from turn 1, and it's one I'm seeing more and more on all stages of the ladder. Scolipede's been due a raise for a while and I could even see it hitting low As.
Sharpedo (Mega)
: Keep in B-
For me, this all comes down to high opportunity cost. Literally the only reason you use Mega Sharpedo is for SJ boosted Crunch. I do admit this is nothing to scoff at, as after a speed boost it has incredible lategame cleaning potential. However, what annoys me most about MegaSharp is the fact you can only use Speed Boost when you aren't mega'd. So literally the only stage you're properly utilising it for is the late game. It mimicks a one-time setup sweeper, and personally I'd rather use regular Sharp with another Mega, and save the singular setup for something like Hawlucha. Idk, personal preference I guess and I know a lot of people like it. I'd love to hear more opinions, but I don't really see a reason to move it up yet. Breloom is also around more often and unless Sharp runs Ice Fang it gets off a free hit / Spore / setup.

Staraptor:
Not sure
I'd rather leave Staraptor discussion to people who have more experience using it this generation. It's still strong, but idk if it really does enough to stay where it is / does too much to drop. I also don't see a huge amount of birdspam, perhaps because of Mega Diancie, Megabro etc? Enlighten me!
Sylveon:
Raise to B
Imo by far Sylveon's best set atm is Specs. It absolutely decimates most switch-ins, obliterates Mega Sableye and Megabro, coverage nails switch-ins unblievably hard e.g. Shadow Ball for Gross on the switch, HP Fire for Ferro and Scizor etc. Sylveon is so sick on Bulky Offense. Subs are also everywhere on shit like Mega Scep, Mega Loppuny, Kyube, Mega Gallade etc and Sylveon can threaten to KO through with Hyper Voice. Definitely B worthy if you ask me. The Cleric set is also still good, and its defenses are fully customsiable depending on what your team needs (can go fully specially, mixed def or anywhere in between).
Togekiss:
Not sure, possibly drop to C+
The only set I've consistently seen is the shitty, predictable T-Wave Air Slash set. I'm really not convinced the Rocks-weak, slow-ass Togekiss does enough in the face of new, crushing threats to stay where it is. However, if other people feel like its Scarf or Defensive sets are good in the meta, and have more experience than me using them, please feel free to disagree.
Weavile:
Raise to B
Such a simple raise for now - powerful, strong priority, great speed tier, incredible offensive typing, access to quick setup, good coverage... Weavile is so scary and
SO hard to switch in on right now, and access to Icicle Crash and Knock Off together only makes me shit myself more when I see it. Speed Creep hurts it a bit but is kind of offset by the fact that Weavile can nail most quicker threats with Ice Shard with a little prior damage. Especially if it's pulled an SD.

Zapdos:
Drop to C+
Birdspam is nowhere near as scary as it once was, and I feel the current top threats in OU are simply too much to handle. A lot of it comes down to typing, but Zapdos gets worn down quickly and smacked hard in too many games these days. The thunderbird's falling from its perch a bit. Still good on certain teams, but nothing to write home about anymore. Definite drop.
C+ Rank
Ampharos(Mega):
Raise to B-
Mega Amphy has definitely improved this generation, and makes an awesome bulky pivot. Its power is often heavily underestimated, and it serves as a fantastic answer to Megabro whilst still retaining good matchups against a large portion of the tier. Rain is also a super strong playstle atm and Mega Amphy functions very, very well on it, obtaining slow pivots to Rain's premier wallbreakers so they can do some work. The only negative is that its Agility set is a little less effective, as the speed creep means it can't outspeed top threats even at +2. Scarf Lando-T also gives it a hard time. In any case, I think the positives just about warrant a raise.
Camerupt (Mega):
Drop to C or C-
Everybody's said it again and again, but Mega Camerupt is pretty bad. I'll make the standard statement - if you're going to judge a Pokemon on sheer power alone, Rampardos should be in Ubers. Mega Camerupt just struggles so much with everything other than hitting hard. It needs to drop at least to C, but more than likely to C- or further in the future.
Cobalion: Stay in C+
Cobalion's niche is still the same. Makes a good check to some Greninja vriants now I guess but the fundamentals haven't changed. Still a Rocker with a niche, and has nice pivot utility with good typing and Volt Turn. Unless I'm missing something big I don't see why its position in the rankings should shift.