It'd be nice to have an option to convert slaves that you sent to your sex dungeon into maids. I originally chose to have some of the slaves I purchased from the brothel to be sent into my sex dungeon but I'm now regretting that choice and wish I chose to have them become maids. I don't want to make a new save file for this however, so it'd be nice to have the option to convert them to maids later.
Also on a slightly related note, I think the game needs more ways to improve Brad's trust. He's at -50 for me rn lol