My wish is for either the mapmakers or HTC when a new map is introduced to online play.
For SEA/AvA arenas, along with cool new maps, we often get custom objects as well...like the new Karelia map's custom airfields. It would be nice to have field layout maps to know where all the field objects (bunkers, hangars, guns, etc.) are. It would also be nice to know safe landing areas; since in the case of Karelia, there are no concrete runways or taxiways.