The list of improvements probably helped. Why would anyone hate on such an amazing game
This, and also people were not hating on the game, they were hating on the decision to port a 2 years old game and asking (almost) full price for it when you can buy it for $10 on other platforms, whilst other recently released games didn't make it for the Wii U.
I mean, the point of the game being ported still remains a mystery to me. But at least there are enough improvements to justify buying it.