Which Milotic?
328 HP/194 Defense/298 Special Attack/286 Special Defense/287 Speed with Choice Scarf or 393 HP/236 Defense/282 Special Attack/286 Special Defense/198 Speed with Life Orb?
Test it? I like the bulkier version, though.
Why is Dusknoir OU? He has (around) 10 more HP, 60 more atk, 10 more in each of his defenses, and a few extra moves than the NU Dusclops.
Why is Tentacruel OU? Usage? UU badly needs more spinners, and I can't imagine him being broken in UU, especially now with Venusaur everywhere to absorb Toxic Spikes and threaten with EQ.
Why is Mamoswine OU? I'm curious if he'd be balanced in UU. He has some serious trouble in OU and still has many exploitable weakness if he dropped to UU.
Why is Electivire OU? Inexperienced players? He may well be too powerful for UU and get voted out, but he seems to me a more reasonable drop than Cresselia was.
I'm strongly considering creating a thread focusing on the possibility of pokemon such as these dropping to UU. I'm weary of all of the misused Venusaur, Ambipom, Uxie, and Mismagius (all great UUs, but using Fake Out as your first move does not impress me).
If I were to create such a thread, would I need moderator permission? And should it go in the OU or UU forum?
Dusknoir is OU because he has better everything than Dusclops who was OU back in ADV. I don't get what you're trying to say here, though. Are you trying to say that Dusknoir deserves to be bumped down to UU? For what reason?
Tentacruel has fantastic defenses, typing [which allows it to absorb T-Spikes], decent Speed (it's actually good :P), and te ability to lay down T-Spikes of its own.
Mamo has GREAT Attack stat, fantastic coverage with both of its STAB, priority in Ice Shard, immunity to both Sandstorm and Hail damage and decent 110/80/60 Defenses. Yep, Mamo secures its OU stat.
Electivire is OU because of good Attack, Decent Speed, good Mixed Attacking stats, Motor Drive, nice coverage and more than being immune to Electric, it actually greatly benefits from getting hit by them. And why did you compare Cress to Vire? Do they have the same role? Does Cress have the attacking prowess that Vire has? Does Vire have the bulk Cress has? Do you see anyone in OU who completely outclasses Vire for it to be moved to UU, and to an extent, BL? Cress suffers from a competition for a team slot while I don't think Vire does.
You can always start a thread to voice out your opinion on why these pokemon don't "deserve" their OU stats, though I think they perfectly do. However, if you decide to this, be sure you have just enough reasoning or your thread gets locked.