Agreed, Larian made a great game. 
I'd like to see a couple of things also.
Pls, if it is possible add:
- abracadabra to casting spells, (I mean when caster says things while casting, that was very well implemented in Baldurs Gate, Planescape Torment) 
- a bit more graphic visuality to spells (for example summon demonic aide has that pentagramm when casting, but it dissapears so quickly <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" /> )
- every chest/door/hatch should have it's key somewhere, to be able to play without necessarity to spec in thevery skills. 
- implement set items. I'd love to have challenge to collect set of equipment which when completed will transform into something even more powerful. 
I definitely have more thoughts, just can't recall everything right now 
 <img src="/ubbthreads/images/graemlins/rolleyes.gif" alt="" />