The design works, why break what's not broken? Besides, it's not like Microsoft has a copyright on analog sticks, d-pads, and ABXY buttons.
Definitely looks like a controller I'd play Smash Bros. with. The pad is cool and all, but that just looks more comfortable for a game like Smash.
I also like what I've seen of that Mario game. Proves that HD games don't have to be hyper-realistic to look pretty.
"Geez, we've been back together for five minutes Doc, and you're already talking about the end of the universe."
"Stupid, stupid rat creatures!"