Slott has been writing the Avenges out of character since their appearance in "Dying Wish". I believe it's only for the purposes of the plot in this case, but I don't really have much problem with it. As for them "itching for a fight" I don't agree at all. Otto basically had no time for them and was acting like his usual rash self and you just knew that there was going to be some kind of confrontation between them.
Force Ghost Peter is awesome...I'm not sure why people are finding him annoying, Otto did take over his body from him and is wrecking his life, how else is he supposed to react? Perhaps it's just the way Slott is writing him. Christos Gage wrote Otto-Peter extremely well, and the other writers who have handled him have written Peter's conscience very subtlety.
Also Marvel has been teasing that Superior Spider-Man #9 is going to "anger" fans even more than Amazing Spider-Man #700 did.