I would like to see modding be supported at a greater depth. That being said the game IS mod-able and highly. What I would like to see is inclusion style support for conversations as well as better sound support. Currently to include custom conversations you have to add into the existing FlavorText file. Meaning mods will not be compatible and any update to the base conversations will require modders to do alot of copy/paste. In reguards to sound. I would like to see the ability to add sound to any aspect. In my case specifically conversations. Which I don't believe to be currently possible. Its also worth noting that sounds/music cannot be included in the mod folder to work at this time.
Those aside my 1 last request for modding is simple. More in game commands from the "`" key to trigger events or ... well triggers. 