Thanks for the input!
The living quarter kinda exists already but it's not accessible since demons aren't allowed there to give them some privacy (It's the door to the building on the left garden side under the milking room technically)
The research zone is an interesting idea, i'll have to keep that in mind.
The refinery can already be done with the crafting room.
The distillery is an interesting idea, I could see it being an upgrade to the crafting room if the Essence items are used a lot.
Again, thank you! All rooms currently in the castle already are determined but we could always try to add more later on. First we need to add all of them and get started on the upgrades haha, we still haven't started on the second floor but we did add the pleasure room to the underground on the patreon version xP