oh my god... i found teh lazerz!
instead of the point system, i have a much simpler idea. throughout the game, the weapon racks in the base/carrier(pelicans, phantoms)spawn better weapons. from there, you can just pick the weapons you totally want! of course, you can't have unlimited focus rifles or anything of that power weapon sort. so therewould be about 2 of each primary weapons to spawn, and about four of each secondary. I think that would make total sense. Again, there would be a limitation. Players can't get two primaries, although i would'nt know how to implement that into the game. bungie could make it work.
dropping in the HEV's, and whatever they are called for the covenant, could be great! if you don't want to pick a weapon, you could drop into battle with two weapons attached to the pod like in ODST. By implementing that part of ODST into multiplayer, they have brought back an element of every game into multiplayer.
[Edited on 05.25.2010 7:43 PM PDT]