You guys are thinking to much of this like halo. This game is not confined into 1 map. Either it would really suck, or they shouldn't put it in. Remember: this game is nuthing like halo, nor will it ever be.
I don't know
That'll take away the rarity of exotic weapons
If everyone had different guns and armor, how are we suppose to acknowledge their accomplishments?
And plus penis shaped guns and helmets
Need I say more?