A suggestion on the whole enchanting balance thing.
What if you just changed all of the enchantments that come from spellbooks to grant an ability? The ability could just be a modifier like monkey reflexes which gieves +1 dodge per level, or grants a spell-ability like heal. This would prevent them from stacking, allowing you to make them a bit more powerful without the fear of them going out of control from stacking. You can leave the stackable + boosts to the items since there are natural limits on quantity for those.
Excited to hear we'll still get new beta releases to try out new things! Access to the beta has made waiting for the release bearable