TAGging, especially, really should give rank promotion the way it gives money. Part of the reason it's not done often or done well is because the reward is quite poor - and that's a bad thing, since it's a teamwork tool, and the game, in theory, encourages teamwork.
With a BA holding a steady TAG laser on something - especially if doing it from hiding in brush at 300m, where it won't be detected - you can raise some serious havoc... but right now, the BA is effectively punished for doing so. Far better to lob weapons and get your rank popped up. Even if you were getting 10% of the rank benefit of the damage that the guy lobbing the missiles, you could get some longterm benefit out of it.
NARCs to a lesser degree and TAGs for certain - to encourage their use, improve the reward for using them.
