Queseda was actually a fan favorite for a while, but I think some of the editorial decisions he's made in the last few years rubbed a lot of fans the wrong way. Even if Jemas was the ringleader, his part in the U-DECIDE debacle hurt his credibility. I also remember seeing an article on how he got in a shouting match with Grant Morrison at some comic convention.
Alan Moore was apparently angry him over something involving the Captain Britain TPB publishing regiment, but I believe he apologized for that, saying it was a mistake, and it's no longer an issue.
