I think, similar to rob skill, there should be a cop skill. You start off with no skill and limited weapons. And as you earn skill, you get better weapons, better/cheaper refills on weapons, better police cars and more skins can come available. Also /crb and /spike should be dictated on that aswell. A final thought, maybe your status of army could be put on this instead?
I think it is fine the way it is.
Cops are really fine in my opinion. They already got all what they need :P
Im not saying give cops more. I'm saying they should not start off with as much. And have to earn there stuff through police work. Such as extra cash, access to the good weapons.