Hi everyone, we were all wondering these two questions before the game came out and now that it is I haven't seen any answers so far. Here are the questions:
1. enemy health and dmg 2. No, but robes give mana regeneration, which is pretty important. Also some alteration spells with perks work better without any armor.
no effect, robes just makes it easier to be a mage with plus to total magika and magika regen, but if you raise the enchanment skill high enough you could theroaticly have the same kind of bonuses on any armour.