Awesome suggestions, especially the no nametags for enemies... I find it really weird that the enemy is able to spot me by my nametag in instances where I am behind cover....
If I may add a few to your list.. (these have been stated before but a reminder is always nice)
Ability to mark bombs (15pts)
Points for destroying enemy bombs (10pts)
Points for assisting a revive (50pts)
Just a few minor ideas to make multiplayer even better, most of which are gameplay suggestions.
• The ability to mark a downed enemy. The player who marks the downed enemy could say something like,"Hey look over there, he's down". This could help a lot with the Interrogation mode.
• The ability to pick up your own placed bombs.
• Do not display names above enemies. This is really annoying, many times I'd be hinding from the enemy and as soon as they look in my general direction, if just a centimetre of my head/ hat is poking out it shows my names above my head and then the enemy just chucks a molotov at me and walks away.
• Unable to be heard by the enemies' listen mode while you crouch walk very slowly. Or at least make it extremely hard to see.
Those are not "minor" changes. At least from a programming or design standpoint.