-Staff equivalents of tenebrium weapons.
-Void magic as the caster equivalent of the tenebrium skill, or adding void spells to the game in one of the existing schools.
-More robe models. Mages have to suffer with the exact same model all the way till endgame, with the only difference being the color, of all things.
-Unique armor with unique looks. We already have unique weapons like the Sword of Holy Flame and Braccus's Axe, I'd love to see unique armors like mystical robes, demonic plate-mail, dragonscale leather, crowns and so on.
-A more in-depth dye system, where you can dye separate parts of your armor, like the actual armor and attached skirt of the female leather armor model.