Well, the rifle will pretty much suck with the distance and gravity thingy especially because it is useless in close range. Other then that yes for shot-gun and SMG.
Yes for heavy weapons but no for mortar because it will be spammed like hell and can be used for massive and anonymous griefing.

i LOVE IT

i have to waste a clip on any one from long range with an smg but yeah i agree everything else i liek it

good idea, it'd probably fix the SMG, without having to reduce its level of recoil or power. and yeah, adding gravity to the bullets would really help balance of future weapons

I think that there could also be mounting, where if you're moving, standing up with no wall in front of you, your gun is pretty inaccurate, but if you move onto a block or something, then it becomes more accurate. red orchestra did this, it might be too complicated for a game like this, so simple, but it might be an idea to think about. so, it'd basically be like the current prone, crouch = more accuracy idea, every other game has, aside from it would involve cover. I don't know if anybody else likes this idea, it seems like it could work, but it might also be weird for this game

My idea: SMG power drops after certain distance (on all weapons, maybe?), making it mid-range weapon, and having a good reason for AR (Assault Rifle). Gravity affected bullets would make a nice place for the sniper rifle. And vehicles for heavier weapons (RPGs, mountable machine guns, mortars, etc). Melee attack for weapons. Anything else? Oh yeah, Pick-shovel! A combination of a pick and a shovel! (example: http://www.amazon.com/Coleman-Folding-Shovel-and-Pick/dp/B0009PUTES )