Implement the Elo rating system. The Elo rating system is a method for calculating the relative skill levels of players in competitor-versus-competitor games such as chess.
The better the player, he would have a higher Elo, then his ENY gets lower for all of his planes, so it's not so easy for him to acquire the better planes. This way a worse player could acquire even a better plane than the old vet, becuase if a vet has the advantage in skill, give the bad player advantage in plane, or just equal them out so the 'vet' does not have a very big advantage.
The Elo would be calculated on how the player performs vs other fighter pilots on the number of kills and damage he makes. (even without returning to base).
it would only go down if your plane takes damage and if you die by another fighter plane player, if you crash or bail without taking damage it would not go down.
And make it so the 'going down' ELO activates after 3 minutes or 5 minutes of flight, so players upping from a field under attack cannot do that to constantly lower their rating.
And a fun feature to complement this, have the top 10 ELO rated players have a 'ACE' next to their name, and other ratings can have different colors.
