Great Hawkeye? You mean the Hawkeye that was ready to shoot Scott Summers in the head while innocent bystanders gathered around to watch? Scott Summers has been a hero in the Marvel Universe for years, he gets possessed by an all powerful cosmic entity, kills a man in the middle of an all out war, and suddenly Hawkeye is ready to put an arrow between his eyes without so much as hearing him out. Bro, you can't be serious bro.
I just thought it was funny when Cyclops kind of turned him around and had him blaming Iron Man.
Look, I was a big pre-Bendis Hawkeye fan, he was my favourite part of Busiek's Avengers and the reason why I love the Thunderbolts, but I see no problem with his development. It stands to reason in my eyes that once Clint had been killed and came back to life himself, he would have a different perspective and be OK with killing people, especially with all of the dark stuff that happened.
The guy's only superpower is that he uses a weapon that is designed to kill, it makes sense, and frankly, I never noticed the whole 'never kill' part of his character, to me, that's more of a Spider-Man thing, or a Daredevil thing when he's contrasted with the Punisher.