Personally, I hadn't noticed the Hate. This is the first version I haven't been keeping up with since Minecraft Beta, so I don't know every feature. I do like the new combat and the wings.
As far as Hate goes. I tend to stay away from Forms and such, so I rarely see hate. But from what I can tell, people don't like having to think in video games. As with this case, they just like mindlessly clicking, the problem with the old combat system was: It was more luck based than anything, just rapid click and you might win. The new Combat is far more fleshed out, but with that comes nostalgia lovers and kids who don't like challenge.
Basically what I'm saying is: Change always comes with criticism, but when it's for the better (As this certainly is.) People will forget and move on, they will get used to the new combat and most will prefer it over the old combat.