Good that you can enjoy 2 handed style even with it's gimpness, but somehow i doubt you have even tested out the different styles.

My testing was done at level 44 with all weapon expertise skills maxed. So i have no idea what your talking about in your post about maxing out all weapon skills except dual wield. The fix would be to add bigger bonuses to the other weapon expertise skills.

Obviously they would need to run simulations to figure out how big the difference is at different levels of expertise, but it is hardly impossible to fix. It is pretty simple math.