If ain't broke don't fix it.
All the game added was multiplayer, and that's all it took to change the way Mario games were played.
ehh shouldn't have to explain personal opinion. the only "great innovation" of nsmbw was multiplayer which ends up with accidentely killing your teammates 50 times. I'm not making myself popular by stating nintendo has no new ideas and is quite content selling endless sequels and never coming up with a new concept, but imo is imo.
(plz no messages for online play) "Life is a tale told by an Idiot" -Shakespeare