Certain things that come to mind with NWN, are something that I think I talked about a long while back, like area 'brushes'. Say you select 'forest', and you can sort of drag a chunk paintbrush and paint an area to be a forest. Or say, a 'coast' brush, or a road brush, where if you painted a bend in the road, a corner would be automatically placed in.
Aurora has everything divided up into branches. Such as Monsters>Animals>Bear>Black Bear or
Item>Armour>Helmets>Stag Helmet
If you wanted an idea, you can download a beta of NWNs toolset off
http://www.neverwinternights.com . You dont need the game to run the beta toolset, it just lets you putz around with a limited version of the toolset, i.e. not all the tilesets and creatures, etc. And not just so you can think of ideas for implementing into Exult studio, but if you have any interest in general, its fun to play around with
