For our V/triad, we're great when we're all living together, and it sucks when one or more of us are apart. But I know other poly groups that are the opposite: it works great for them in separate living arrangements, but they wouldn't want to all live under the same roof. It really depends on what you want as a group.
In any case, I think the key is constant communication. If someone is unhappy about something/anything, then they need to speak up. And everyone else in the tribe needs to listen and be supportive. One of the best pieces of advise came from a RL poly friend of mine when we first created our tribe. He said that being poly is all about talking. Talking. And then talking some more, until you're all talked out. It really works.