Here is a system I think would work.
Points based rank system only, the higher your points, the higher your rank.
Let me elaborate, think of it as simply ENY.
A kill earns u points, depending on the rank of who u kill is how many you u earn and vise versa to how many u LOSE if u are killed.
Almost like a Chess rating. and make a SET amount of points for landing, ditches, captures, not a PERCENTAGE, like say u get 50 points for land, 25 for bail, 10 for capture, and none for death,but u still get your kill points for the sortie, just no bonus points.
This system can be used in all modes for player KILLS.
BOMBING, ATTACK, GVs can have a second scoring system added for TOTAL DAMAGE POINTS,and the 2 combined scores would equal the whole score for each catagory.
So instead of having 6 different ways to score in each catagory, u limit to just 1 OR 2.
CV control should stay the same, there is no real solution to that.
AND DO AWAY WITH ALL ARENAS BUT 1 LATE WAR, and anyone that is not in a squad when they log in should automaticly go to the country with least people. and knowone should be allowed to go to switch to a side that has the post people in the arena if they are not already on that side.
Short of this I would have to say NO SCORE AT ALL. and 1 ARENA, and CVs are assigned by first come first serve.