Your perks carry over to the equipment/scorestreaks you are using. Tired of your Guardian getting EMP'd? Run hardwired.
An entirely new set of options to modify your scorestreak/equipment. Adding a blast shield to the guardian so it cant be blown up. However that takes up a slot for another streak. etc
Would be kind of cool.
Would be hard to balance. Most choppers / air support -would have to be limited on what it could do.