The same Smash Wii U game that has the biggest tournament ever for a Smash game at EVO 15?
If people abandoned the tournament scene for Smash Wii U, I haven't seen it. It was a flawed competitive game for much of the first year, but that didn't keep people way, instead the constant steady of patches kept people interested and playing the game.
I did see a lot of whining and bitching from top to mid tier players about their characters changes on how they played from patch to patch. You still here whining from ZeRo, etc. about Day 1 Diddy and what they done to him.
Edit: A lot of tournament players were happy with the initial release of 3DS/Wii U and didn't get annoyed until the day 1 Wii U patch nerfed their top tier characters. That was when the whining started.