I dislike evasion as much as the next person, but I honestly can't think of a GOOD reason to not allow these two abilities at the bare minimum. They are far from uncounterable, and they have a time limit. There are plenty of equally annoying strategies that are legal and not dominating. Paraflinch was one. Hazard phazing is another. It shouldn't be a forced ban if it's not necessary. At least even with Double Team you still have the potential of hitting them while they are setting up. Copycat Roar however was almost impossible to overcome with even fewer counters to it. There have always been means of countering evasion. Phazing, early Toxic, 100% accuracy moves, set up alongside them (they can boost evasion all they want because it's only going to take one +4 attack from me to take you out). Anything with Red Card. You can't say something is broken if your counter to it died during the match. You could say the same thing if your priority user is gone and you can't stop a sweep. Or if your weather setter died when there's is still alive. It means you got played around. No team is prepared for everything, and it's not fair to keep asking to ban the moves and abilities in general that you happen to struggle with. Something is only really broken when you CAN'T counter it.
Again, I would much rather NOT play with evasion. Certainly Double Team/Minimize. But I simply can't rationalize keeping, particularly, those two abilities banned. Not to mention what does it add, 10% evasion? That's WAY better than being paralyzed, confused, frozen, asleep, flinched, or even just using Fire Blast against ANYthing!