Face it, shinies are only in it for braggin right rewards and that's all well and good.
But you know guys, If I told you before gen 4 that machamp would get no guard and that it would be possible to stack SR and TSpikes with regular spikes, you would have cowered in terror saying it would be broken.
I don't think that this aero will be broken. It falls to priority users, plus you have to set up the entry hasard, which is easier said than done. If you don't set enough, then sleep talk only have 16 pp, which go away quickly.
It can, however, setup a dragonite extremespeed sweep by weakening everything.
But paralysis does set up a glaceon sweep in hail, and no one will say that thunder wave is broken.
A new generation will bring diversity. It's aldready impossible to counter everything, it's not so bad. Just play your own game. Have the other guy try to counter you.