I've always maintained that the heavy bombers should have a small perk cost applied to them on the basis of the the raw amount of damage they can deliver and their ability to defend themselves as well.
Lanc/ 14k = 5 pts
B24/ 8k = 4 pts
B17/ 6k = 3 pts
B26/ 4k = 2 pts
I know some will argue then the Ju88's need a perk of the same theory is applied, but I cant find myself arguing for perking those slow climbing, slow moving, weakly defended, yet well loaded (6600 lbs. worth of ordnance) bombers. 
I vote for increasing the Me262 and the Me163 perk cost. ESPECIALLY the Me163 now since we're having bananas game the game on that odd ball island map.
Bombers are here to DO damage so why perk them for doing what they are suppose to do? The B29 I hope will be perked due to the extra damage it can do.
I wouldn't consider squadron colors and ID's being added to planes and vehicles as "field modifications". That was something that had to be done, much like adding fuel and bullets
I have thousands of perk points. I've been playing a long time and don't even think about "perks". I fly what I want when I want to and don't ever give it a second thought. I remember one night I used a ton of them upping a tiger time and time again in this one big battle we had going. I may have killed as many as I got, but the points don't balance that way LOL!!! noticed a dip that night!
If you have a crap load of perks and it bothers you, up some perked rides....turn fight in a furball with a 262, break a spawn camp with a tiger, strafe a CV with a 234 group a few times. Perks are easy to earn, and easy to blow.
