I will be imposing penalties on using heavy armor and using two weapons. No matter how skilled you are, the amount of skill and concentration it takes to wield two weapons at once (I speak from experience here and I have the bruises to prove it) is enormous. Also, wearing heavy armor will slow you down, you can't avoid that. The ability to equip heavier armor or use two weapons in and of itself isn't bad, but there will be penalties attached to it.