Why is Blaziken still Uber?
It's has a mediocre speed when unboosted, has only above average offenses, weak defenses, and, unlike Greninja, predictable coverage(rockslide, thunderpunch, earthquake, brave bird, knock off. That's pretty much it).

It can't even Baton Pass anymore because of that abysmal clause.

It would be a fantastic wallbreaker OU, destroying things like Mega Sableye, Amoongus, Kyurem-Black, Jirachi, and mixed defense magic guard Clefable.

This is balanced by the fact that several major OU Pokémon either wall it or annihilate it even when boosted:
>Mega Altaria
>Mega Slowbro(mein stall)
>Landorus-T
>Garchomp (tfw tanking Flare Blitz with rocky helmet)
>Alomamola (muh precious stall is saved)
>Rocky Helmet defensive Gastrodon
>Dragonite used Extreme Speed
>Unaware Defensive Clefable
>Mega Pinsir used quick attack
>Jellicent
>>>>> Brave Bird the Pokémon

I mean, why not just bring "BLAZE"ken down to UU/Bl2?

Smogon really dropped the ball.