The idea that DKCR: Tropical Punch is beneath Retro, or that Retro "deserves better," or even that the game isn't worth making is simply nonsense. I'm sure the game will be at least as good as the first one (which was pretty damn great), and will likely have a better soundtrack, and will sell well. Being disappointed because you wanted to see them do something new is one thing, but some of the statements and implied statements towards this game are a bit much.
I will agree it's disappointing that Retro isn't doing something new, but it makes me feel like a douche because I know the game will be quality, and it makes me afraid that we won't get another DKC game of this quality for a long time afterwards because of the generally negative/apathetic response.