For a future DS game (if Square hires them for DSIV) I'd like them to build up on the current combat system (as its the first Obsidian game where the combat is actually really good YMMV) go deeper into the narrative/dialog sector with more exclusive content regarding the different heroes.
In fact pretty much go full on fantasy Alpha Protocol with enjoyable combat. The groundwork is there.
Other things I would like to see in a sequel: Better/seperate online camera, Stats better built into the game (there are lots and they have effect but they seem a little too "disconnected" at the moment) and more meaty quests. Other things as well but not much important stuff. (May be forgetting something important, though)
Also. For a possible fourth game use a bigger team of designers/writers. And dedicate a small team to make online modes/improve the online experience.
Edited by Tale, 22 August 2011 - 10:39 AM.