As far as Fazzi goes- he was severely underused. The producer didn't like his vocals (which is insane cause he has amazing pipes) so he talked Adam into doing vocals on his own. He brought a lot of creative ideas that I personally enjoyed (like three people harmonies and a bass solo) so I think loosing him was a huge loss for the band. I remember reading the shit Fazzi did that led to him getting the boot and I just think the whole situation is a bit sad on both ends, wish it could have worked.
I love Nolan so if he is used more properly on the next LP- I'm in!
What'd Fazzi supposedly do?