Ok, so after what feels like A LIFETIME OF MARIO STAGES, I've finished every last damn level in NSMB2 with exits & coins.
And...it's still meh. I feel like that guy who said Tekken has too much content. There are just so many freaking stages in NSMB2, yet 95% of them are boring unimaginative filler. There's a couple of creative stages (mostly the A/B hidden levels), but not a single one of the 50+ stages reaches the high of some of the better 3DLand or Galaxy stages. It definitely feels like a fanmade Mario game. It goes through the motions but brings nothing to the table. I didn't hate it, and it was moderately entertaining, but at the end of it all now it just feels like wasted time that could have been spent playing a better game. Hope the Wii U game is more interesting.