In general people tend to update the roster with info about people's roles, abilities, behavior, etc. You can tailor it however it is useful to you! I'm not sure how useful that will be in this game since it seems like not many players will have abilities or even roles, but you really can use it to keep track of whatever you want!
In a game like this, I think it would be somewhat useful to watch voting patterns, timing, and just general behavior. We are going to have to get information from what people post on the thread, and make decisions from it.