Well, you did say that you were tired of 2d platformers and Rayman Legends obviously is one. However, if you don't mind buying a 2d platformer, then yes, it's absolutely worth it. It's one of the best games on wiiU and one of the best platformers in a while behind SM3DW.
Predictions for LT console sales:
PS4: 120M
XB1: 70M
WiiU: 14M
3DS: 60M
Vita: 13M