Like who has the top hit %, or who has the best overall score in a particular type, etc. Like, for example, when you call up your scores, be able to click on your ranking in any of the fields (%, kill/death ratio, deaths per sortie, etc.) and be able to see, say, the top or 50 in that field as of the last score update.
Might be useful both for those of us who wonder how we stack up against others who fly our favorite ride and for someone trying to find an older hand to teach them the ropes in a plane they aren't really good in.
I know I for one would like to see who the top-shots are percentage wise, as well as who is the "best" (according to the stats) in the various 109s.
Might also be nice to look and see if the guy who keeps killing you in the same rides is really that good in it or if he just has your number.
If it can show you where you rank, it should also be able to show where others stand in the same categories.