I had this idea a looooong time ago on cod4.
But I was thinking that people that are level 50+ should be able to throw anyone noob under level 15 onto a frag grenade if they're near you and a grenade comes by.
no sound when defusing or planting
no aim assist on you
run while crouched
no red name above head when aimed on
all ghilled up - ghillie suit and ghillie on gun
suicide bomber - takes up perk 1, takes 5 seconds to set up, when setup, can get out of it until you use it
when knifed, blood splatteres on enemies face for 3 seconds
health regenerates faster
more dogs when called
steadier sniper scope movement
speed - (takes 160exp to activate)-when activated, for 30 seconds, the player runs and walks a lot faster and longer but the players vision is disoriented
capture flags faster