Why would you move from Haskell to Go? There's a night-and-day difference between them. I don't understand why you'd switch to a language because of the features it's lacking, unless you think those features are a bad thing (and I have yet to see a reason why generics and TCO are a bad thing).
Of course they are not a bad thing. It's just that Go has character. It doesn't have generics or C++-style classes just because every other language has them. I respect that.
