Here's my first contribution of three of the Pokemon that moved down:
Infernape --> A+: It has an absolutely insane movepool that causes mind games. It has a great speed tier of 108, and it has two moves that compliment it's STAB attacks. Have I mentioned that it's versatile? Just a few sets are suicide lead, mixed attacker, Band/ScarfNape, and most of those are actually viable. Infernape is in a similar sense of Hydreigon - it always has a chance to carry a move that will be super-effective against the opposing Pokemon. The downfalls are probably just it's bulk - similar to Sharpedo. It cannot switch into much, but in my opinion it plays around that as it's probably the ultimate check to most Pokemon out there. My personal favourite (Including playing around with it) is ScarfNape. Being one of the fastest mons in the tier (Faster then Mienshao!) it can easily outspeed and kill anything. It does have 4MSS but as I said, being so versatile, fast, and powerful should make it good enough to be apart of the beasts in A+.
Goodra --> A-: In my opinion, Goodra isn't THAT good, and it seems to bit with the A- group. While benig a HELL of a good special wall, it's almost completely outclassed by Blissey as a specially defensive wall, leaving Goodra to be a bulky special attacker. Although being able to fill the specially defensive role still, it's simply not as good as Blissey who has access to reliable recovery, WishPass, and can even fucking set up rocks (Even though it's not a very good idea to do that). With physical attackers being more populated in UU, it's special side isn't as good as it could be. Thankfully, it does have a great ability in Gooey, letting it stop physical setup sweepers that could potentially tear your team into two (Scarfed Heracross, Mienshao, Victini, etc). It also can actually not die from the ever so common fighting types in this tier. It has power similar to Starmie, special bulk that is almost better than the entire tiers, and it can take physical attacks well and retaliate with Gooey, this, imo, should be enough to make it A-.
Lucario --> A(-): With Lucario being my favourite Pokemon I could just say S Rank pls. But of course no one gives a shit about my favourite Pokemon so I'll elaborate. Lucario is a Pokemon that has INSANE power. So it has an SD set that's very common, but so what? When you' have the power that Lucario have, you can be as predictable as you fucking want. +2 Priority almost makes up for it's lack of speed, and nothing in hell switches in at +2. I mean nothing.
+2 252+ Atk Lucario Close Combat vs. 252 HP / 252+ Def Hippowdon: 246-289 (58.5 - 68.8%) -- guaranteed 2HKO after Leftovers recovery
That is a maxed out defensive Hippowdown, and Lucario also didn't need Life Orb to do it (Life Orb is kind of a waste in my opinion). The only thing (In my opinion) that stops it from climbing higher is that it's too slow. 90 base speed leaves much to be desired, and it mostly works on a Sticky Web team. In general Lucario is just a bomb and should be placed at least A- if not higher. (Sorry that I didn't elaborate well on this one, I was tired when I was writing this)