Perks in the CT are a set up tool for the CT staff, one we used to use more often but realy havent made much use of lately.
Perks in the CT are generaly used to limit plane usage of certain types of aircraft/vehicals to mimic more historical usage levals. Or like they are in the MA to limit plane usage of types that could cause a power imbalance.
Personaly Perks are a big pain in the pooper, first off we cant modify them ourself's so we nead to get HTC to do this for us, they are busys folks and geting this done in a timly maner can be problimatice for them and us.
Perks realy dont work to well for limiting certain planes for a number of reasions many stated above.
Perks are also rarely used in the CT peoioud, the only thing that I have spent them on lately has been the Tiger, and I had so many perks in the vehical catagory this was kinda a joke I had had like 1200 vehical perks thats a lot of 15 point tigers:)
So in short your not realy losing anything to lose your perks since most all the set up's have no perk rides, and those that do do for a reasion.