my idea:

hotkey bar on bottom (easy recharging soul just by hovering over the item in hotkey bar and pressing "T")
multi key recognized hotkeys (ex. ctrl+1)
item/magic windows like in morrowind http://finalshotgaming.files.wordpress.com/2011/08/26818-the-elder-scrolls-iii-morrowind-windows-screenshot-inventory.jpg
health/mana/stamina/exp bar visible at all times

UI modification/ideas/suggestions as well as anyone who can contribute to the effort being made there to bring us a non broken UI should probably be posted in http://www.gamesas.com/index.php?/topic/1275750-modding-the-gui/