Some have suggested that once you get a "perk" plane, you lose it when you crash it. With the re-arming stations, you can hang on to the plane until you crash or log off.
I suggest that there be a limited number of "perk" planes in the air per country. There could be a way to *randomly* distribute these planes to players, or give priority to those who have not flown one recently.
Once you get a perk plane, you own it until you crash it, switch planes, or leave, at which point it will be put back into the lottery for someone else to fly. This might help get more people online... thinking "maybe tonight I'll get a ride in a TA-152!"

Giving planes out based on pilot performance just is not fair to those of us who aren't aces, and it makes facing the already steep learning curve that much more difficult.
Salute,
IC