Just because the project may be KOTOR2 doesn't mean that it can't posess desirable elements from those games that you mentioned. Hopefully they will.
Here are some of my suggestions - I try not to mention what others have:
1. Customisable qickslots like htos efrom NWN. Let the player customise weapon combos, feats, actions - anyhting you can think of. Heck, if you could put "save" weapon/armour combos and put them in the quickslots so you can switch at the touch of a key that would be excellent. You could either have the player select a choice from a kind of tree for the quickslot or just drag the action into the slots.
2. Have more good/bad decisions that aren't just more money/rude etc. Personally I'd like to see manipulation of people, playing both sides etc for your advantage (determined by stats?). Palpatine was definitely evil but everybody thought he was on their side. Of course, the usual pwning people with your powers is still welcome. Basically more mature evil and not immature stuff.
3. Appearance - the portraits morphing to your allignment were cool, but it seems a light side portrait didn't change much. Maybe a more serene profile, speech style or something. Personally my theory is light siders eventually turn into Yoda things. Maybe have NPCs etc react to your condition etc.