tweak idea to hit enchantments

I always seem the enchantment only hit system from weapons is not the balanced things in bg2, despite only a low amount of enemies need +4 or higher weapon to hit. But what if a tweak, that only leaves two type of enchantment in monster mean, the magical and non- magical weapons. And top of that the stronger monsters gain damage reduction. The weapons keep their enchantments to gain to hit bonuses but a dozens of weapons will be valid until the end of game.

What do you think ?