Damn, you sniped me. I was this close to getting them posted. But, for those who are interested in the original thread, you can find it
here. Now, I want to give my thoughts on the OU drops.
Mega Gardevoir
This Pokemon is absolutely broken in UU, literally 2HKOing everything in the tier. Yes, this includes Mega Aggron and Mantine. Obviously, Scizor checks it but that's where the UU room and I made the strategy of Eject Button Alomomola into Magneton to trap Scizor for Gardevoir. There's no doubt in my mind this Pokemon will be suspect tested/quick banned.
Jirachi
Jirachi is one of those Pokemon that I'm unsure of how well it will perform. It has a multitude of different sets, even able to run the Z-Celebrate. Now that I think about it that sounds pretty bad, so maybe we will get rid of it. It also has a Scarf set, Calm Mind, WishProtect, Rocks, and many others, as well as having insane coverage as well. The more I type this, the better I think this Pokemon is, but I'm still unsure as to whether we'd want to consider banning it or not.
Nihilego
I think Nihilego will be a great Pokemon, able to set up both Stealth Rocks and Toxic Spikes. It can also run a Specs or Scarf set, to break through a lot of the meta. Hell, it can even run Scarf Hazards, as suggested by the UU room. I don't have much else to say about this Pokemon mainly because I know almost nothing about it. It's too early to determine how viable it is, especially since the top 3 Pokemon commonly use moves that beat this Pokemon. For now, I'm going to say that's it's going to be good, but not broken.
Mega Gallade
This Pokemon, like Mega Gardevoir, seems absolutely insane on paper. Both it's STABs are extremely good, Fighting and Psychic, as well as having access to Knock Off. It's speed is pretty good, tying with Latias, as well as being able to set up a Swords Dance, or even Bulk Up. I personally believe that this Pokemon won't be broken, but will be very good.
Mega Ampharos
Two words: Absolutely terrible.
Mega Latias
This Pokemon is one I didn't think would drop, but somehow it did anyway. Mega Latias is mainly known for it's BoltBeam Calm Mind Recover set, which does put in work, and it certainly will in UU too. BoltBeam coverage is what a lot of people would call the best coverage in the game, and that really applies here. However, that doesn't mean it doesn't have it's answers, such as Scizor and Kyurem. It can also run an offensive Calm Mind set, which I assume will be the most popular. However, we'll have to see how that goes. What regular Latias has over this though is the ability to run an item. Sometimes you may want a Scarf Latias and obviously Mega Latias can't run that. All in all, I think this Pokemon will have a place in the UU meta, but we'll have to see how big of a place that is.
Mega Heracross
This Pokemon will be good and I'll tell you why. Heracross itself rose up to UU because of it's damage capabilities, so I believe this Pokemon will be used also if not more. It will still be used in the same way Heracross was: Tailwind support. Also, while it does miss out on Guts, keep in mind this thing has the highest Attack stat of any non-Uber Pokemon. I know some of you are thinking "oh Talonflame counters lol." However, that's not the truth. Mega Heracross is able to run Rock Blast, that puts Talonflame in check, and if Talonflame is damaged and rocks are up, it's not even a check. Overall, this Pokemon will be great.
Mega Altaria
I'll be honest I have no idea what this Pokemon does other than Dragon Dance but that seems pretty powerful in itself but it seems Scizor may be a soft check and that's because Mega Altaria can run Fire Blast. We'll have to see how this one plays out.
Mega Manectric
This thing is going to have a lot of rivalry with Raikou because while it is faster and more powerful, Raikou has access to items as well as Calm Mind. It's also slightly less bulkier than Raikou is, so that's a little minus, since it's not a huge difference. It also has Overheat/Flamethrower over Raikou which is cool. Overall, it's going to share some competition with Raikou, and I think Raikou will just come up on top, since you can run a different mega + you have access to items and set up.
Hoopa-U
I wonder when the quick ban thread is going up...
Rotom-Wash
Oh look, a Pokemon that's not entirely broken! Rotom-Wash is going to be decent in UU, as it can run defensive sets as well as offensive sets. Having access to both Will-o-Wisp and Thunder Wave is cool too, being able to shut down some threats. It also has a pivot move in Volt Switch, allowing you to damage counters as they switch in. Mega Sceptile is the hardest counter to this Pokemon, like the hardest counter of all time so there's that. Basically, this Pokemon will be okay.
That's all I have for now, if these posts seem stupid that's because this news just dropped on us and we've not seen how they perform in the tier. Quick ban Hoopa-U btw.
Edit:
Smeargle
I forgot this Pokemon. It invalidates Shuckle and makes webs more viable. Nothing more to say than that.