well, I don't know what any of these perks do.
Quick Revive = When you take enough damage to die,you get downed wile holding a OP pistol that shoots granades.
After few 6-8 seconds you get revived.
Juggernog = Allows you to take more damage than usual (normaly its 2 hits by zombie,but it makes you able to take 4 hits).
Speed Cola = Faster reloading baby!
Double Tap Root Bear = it doubles the damage of every weapon.
The thing we might want to remake since its way interesting is Pack a Punch,a machine that upgrades your weapon.
Adds a laser sight,makes the gun color more futuristic and makes the gun shoot faster for example.