No mana regeneration is a decision with some awkward design implications (Larian have to be much more careful how they space monsters around rest points) but I'm mostly happy about it. The one thing I would say is there should be either wands or 0 cost spells that wizards can fall back on when they are conserving their strength.
For people uncomfortable about Wizards not needing any stat other than Intelligence these could have variable to hit and damage based on Perception.
