About your own mod, I have noticed it before and really like the keyboard navigation through the slave list in the mansion. Comes in quite handy. Also, the inventory sorting is a must.
Can not say I've hooked up things like mass spells or any of the export features though. I tend to play keeping spell usage almost exclusively to combat. Not come up with any use for the export either (I see you say you use it for the repeatable quest system, which certainly could use help. As it is I just ignore the quest system when I play.)
As you say, modding the game is a lot of the fun.