In GAM 100, I was on a team of three, including myself. When it came time for us to figure out what our game was going to be, one of the other guys had all these crazy ideas for how it was going to be the best game ever, with all these different features and characters and classes and perks and procedural generation and so on and so forth. I started to panic, since I'm terrible at being social, but, having made games before enrolling, and also because I had a brain at all, I realized that these ideas were all incredibly overscoped and there's no way the game was going to be anything but a trainwreck. I designed and prototyped an alternative game idea, one that was incredibly simple but left plenty of room for level design, polish, and additional features, but my teammates rejected it because the one guy really liked his idea and the other guy sided with him for some reason. I left the team and made my idea by myself, and it turned out totally fine. It wasn't the best GAM 100 game of all time or anything, but I got the basic game done very early on and spent the rest of the time polishing it, while my former teammates hired another programmer and struggled to pare down their design into something that had even a remote chance of being completed. Their final game was totally fine, but holy shit am I ever glad I didn't have to go through that. I still have their initial "design docs" (seriously, they're so full of the most earnestly overscoping to the point that it seems like satire), and my response to it (including the design of what would become my game), saved somewhere and I could totally post them here with names redacted… but I dropped out, those guys are still enrolled, and I don't need to give them (and, by extension, everyone else who used to be friends with me) any more reason to hate me :\
As for advice: this won't help you, obviously, but maybe it'll help people looking for new teams:
Don't be on a team with your friends. ESPECIALLY don't be on a team consisting of nothing but you and your friends. If it were up to me, DigiPen teams would be randomized anyways.