I don't think throwing is OP, more the damage each level of PT does. For example, I had a pure str build and got to 11PS and 11PT. It was awesome, only 30 throwing wpf but the reticule was still pretty tight using wardarts
And who the hell cares about accuracy with them? The main use of them is chucking them into crowds before the melee to weaken the enemy, you don't aim at one guy with throwing, you aim at a huge group, it's almost a guaranteed hit. So IMO just nerf the damage PT does