The spread of SMG's and AR's needs to be significantly lowered. I constantly feel like slamming my face on the desk because even tho my aim is directly at the enemy's head, only 1 in 5 bullets hit it from medium range. Skill is irrelevant in aiming at the moment.
Think about it, there are head shots in the game, yet you theoretically can not intentionally shoot someone in the head with an SMG unless you're standing right next to him, because the spread is so high.