My memory tells me I saw something like this before, but couldn't find any proper thread, so...
It would be nice if one can click on realm authority bar to see somekind of leaderboard with numbers showing what member contributed most XP to the realm authority. Maybe even make it have "All the time", "Monthly", "Weekly", "Today" ratings.
It may serve multiple purposes:
First of all, any kind of competition elements are positive for game-activities (not my opinion, science!) - so it would encourage realm members to take more active part in realm life.
Second, It would show ppl the most useful members of realm so they may be rewarded with some material bonuses from realm keepers or with respect at least.
Finally, it may show some 'suspicious' activities from unfair players so they could be revealed more easily