Here are a few more things I noticed:
1) Staff spell projectiles do not seem to go through the floor tiles that have a red message on them. I believe items also block it.
2) The Clairvoyance spell is kind of counterproductive cause I can no longer see where I have been and may miss out on items.
A solution could be to have the spell also highlight items, similar to the Awareness spell, but without showing enemies.
3) I just found out you can use the Enchantment Spell to refill item charges (staff,pendant)! Pretty cool,but 1 charge might not be worth it compared to permanently boosting a weapon/armor.