I would like to see an analytics tool in xf giving insights into member behaviour. For eg: no of new members/month, no of active members, no of members with 0/<10/<20.. posts, most frequented forums, individual member activity records (so we have brief idea of history - account changes made, bans, ip changes, no of conversations, no of reports received) etc etc. Things like these can give insights into what exactly our members are looking for and what type of members we have.
Google Analytics is good for an overall understanding but I am looking for is some in depth report (stats that are very specific to forums).