Well ok.
When I first saw the game, I cannot express how disappointed I felt. A sequel to 3D Land as a mainline, console Mario? What the hell? It seemed lazy, uninspired and so conservative. I still feel that way.
But a few considerations.
Obviously, local co-op is the big addition here. I have never played a 3D platformer with co-op. It sounds pretty cool, and the 3D land style is definitely suited to it. think about Galaxy with four players. It wouldn't work. The camera would not be able to keep up. So in that sense, the 3D land style of Mario is a smart idea here.
Also, the game is most certainly goes further than the 3DS game did. Its prettier, for one. And it has original boss fights, for two. It might also have worlds that are more defined visually, compared to the 3DS game. So thats cool.
Look, I'm still dissapointed. How could I not be? But I loved 3D Land. And though i hope to god we get a big, epic, creative Mario adventure, this was probably easier (And faster) to pump out, and I'm sure I'll have fun with it.
With friends.