You're right about Cordelia's place in the Scoobies, and while I understand given that Cordelia wasn't the nicest to them and everything, they also didn't exactly open up to her. I also have a head canon that some of Cordelia's worst behavior was because of everything going on with her parents, and of course she resented that the Scoobies weren't there for her even though they didn't know. :/

Yeah, I wish we'd have more Faith/Cordelia scenes too. Really Cordelia's character was wasted in general though - I know they had to work with Charisma Carpenter's pregnancy, but I wish they'd done it differently. (It also bothered me that they went and killed Fred in a similarish way - it's safe to say the last season was not my favorite.)