@ azeke: You are forced in that level of the demo so that the demo can show-off the gamepad stuff. It is my understanding that in the regular game, you can switch characters at will. I am sorry, though, that I don't have anything to cite for that conclusion other than my own dim, aging memory. So, at best, the jury is still out on whether you are forced to play the gamepad character in any given level.
Apart from that, I think it comes down to a matter of opinion. I love the gamepad stuff, others don't. If I am "forced" in some levels to do the gamepad stuff, I am fine with that.
I never said that 3rd parties are not full of crap when it comes to Wii U, just that I think the Rayman game will be best on Wii U. In fact, in other threads, I have repeatedly stated that, for those games in which I have an interest where the 3rd party is refusing to port to Wii U for b.s. reasons, I will go out of my way to buy used if I decide to pick up the game at all.