Well, Rayman was always floaty, I have no issue with that. But yes, NSMBU and DKC: TF have more responsive controls and their mechanics are basically perfect.
The physics have some minor bugs and the levels some glitches, but the average player won't notice that.
The visual appearance has a lot of variety, but the "pure" level design isn't always on a high level (especially the slow-paced levels). Music and invasion levels were mostly great.
I didn't have problems with the controls or AI in the Murphy levels during the singleplayer, but it can be annoying in the challenges. The lum duplications fail to work sometimes because the touchscreen controls can react too slowly. And certain sliders (see picture of today's challenge) in Murphy's dungeon are mostly impossible with the AI, they only work on some days. The top players developed techniques to control Murphy with their feet on the touchscreen or they play with two players.
I'm still playing the challenges for 5 minutes most days to get a gold medal, but it doesn't really make much sense because they lack variety.
I'd rate Rayman Legends lower than DKC: TF (best level design of any sidescrolling platformer, great music), but higher than NSMBU (lazy with visuals and music, but better than other NSMB games).
EDIT: lol, two sets of sliders worked today, that's pretty rare.
