There'd still be too many things that'll go wrong. First of all, I'm sure not everyone wants to spend their time looking for an Uber with a crappy nature and bad IVs and train it to be the worst it can be. If you try too hard to make an Uber bad, it'll just be outclassed by Pokémon that are meant for the role, which would result in no one using them anyway. Besides, having a well balanced team with 6 Pokémon having Pressure would be broken anyway. In OU this isn't possible because very few Pokémon outside Ubers have Pressure and actually work well together. And bad IVs and nature can only reduce a Pokémon's stat as much as the base stats allow them to. Lugia still has insane defenses with bad IVs and nature, the latter which can't even decrease both stats and EV training could still patch it up reasonably well.
I'll be honest, I, personally, wouldn't want a full team of nerfed ubers. I'm just talking about one, or maybe two. I think the point you're missing is that I'm not doing this for strategic value (though, it might just happen due to it's "Huh?" value, commonly known as the element of suprise), I'm doing this because I simply love these Pokes. A lot of my team isn't the best OU Pokemon (some aren't even OU, for that matter), I just like the Pokemon themselves. No one gets upset if I use UU Pokes in the OU environment, but they
will get upset if I use Uber Pokemon. However, I love Mewtwo. He's one of my favorites, and I'd love to use him in some actual battles. If I have to make him use his weaknesses in order to counter-balance his over-powered strengths, that's a sacrifice I'm willing to make for the sake of using one of my favorites.
So now we have restrictions on how high a Pokémon's IVs can be? That will never work, seeing as a physical sweeping Mewtwo is still a perfectly valid set and after a couple of Bulk Ups, a super effective Ice Punch and Earthquake will hurt despite bad IVs. And once again, EV training helps, or are we going to ban that as well?
I understand that it can be used to the point of being too good still. I'm willing to side-step that. Again, I just really love Mewtwo, and I'd like to use him competitively. I know that it might be a strategic nightmare, and trying to nerf him to the point of being usable, yet still not crappy. I might have overdone it on
how much I'd nerf him. I just want him to be within the strength confines of the OU environment.
All Ubers can be nerfed enough. Give Deoxys nothing but Cosmic Power, Kyogre Rain Dance, Groudon Sunny Day, Mew Recycle etc. But despite how much this sounds like a good idea according to your logic, even you have to admit it just wouldn't work.
I guess I phrased that wrong. Perhaps some Pokes can't be nerfed to the point of being usable in an OU battle. Some might need to be extreme one way or another.
Ho-oh only has 15 less base Sp.Attack than Azelf and an amazing movepool so yes, it would indeed dominate OU provided that it gets Rapid Spin support. IV nerfing wouldn't help and having IV restrictions is still the most ridiculous thing I've ever heard.
I understand it seems foolish, and on any other Pokemon, it would be. Just try and understand this from my viewpoint:
I understand the banning of Uber Pokemon in competitive play. When used to their potential, they are far too strong for typical competitive play. It makes complete sense that they shouldn't be used.
However, one of my all-time favorite Pokes is one of the most Uber of all Ubers. Ever since I got into Pokemon, he's been my favorite. However, because of his stats, unless it is an all Uber fight, I can never use him competitively. Since none of the other Ubers really interest me (I just threw Ho-Oh out there for more potential ideas), I really don't want to raise an entire team of them. So, basically, I'm stuck never using one of my favorites, which saddens me.
Bringing them down to the level where OU Pokémon do their job better defeats the point of using them altogether as I already said.
Not when your point of using them is simply because you like the Pokemon. It may be pointless strategically, but for a nostalgia/favorite-style team, it makes at least
some sense...
Here, maybe if I show you a Mewtwo concept I'm thinking of, it'll make more sense. Keep in mind that I'll have his IVs set to a point to where his defenses won't be extreme. Same goes for his speed. Also, keep in mind that this is an off-the-top-of-my-head moveset without much thought behind it yet...
Mewtwo @Lefties
Brave (to lower his speed, but still make his Attack okay)
252Attack/252Speed/6HP
Brick Break
Psycho Cut
Stone Edge/Twave
Recover
According to Serebii's Stat calculator, even with 31 IVs in everything, his stats come out to...
354
350
216
344
216
323
If I make sure his IVs in HP and speed aren't astounding, his stats won't seem so staggeringly high. Again, I know it seems brainless to purposely make a Pokemon weak, but my point of using him is for the cool factor that it's a Mewtwo. I just like the Pokemon, and would like the chance to use him.