The Area51 sidebar contains these useful tidbits during the commitment phase:
However, none of these are available in the definition phase. They should be! "Followers also committed to", "Followers also following", and activity/roles stats would be useful when discussing whether proposals should be merged, predicting what the user base and community will be like, and choosing which proposals to follow. Additionally, a "Committers following" statistic should be added to the commitment phase.
I understand that the roles are not known during the definition phase. I could easily see this being added (probably as an optional parameter) after clicking "Follow".