Using testingcheatsenable true I've been going around town trying different household and taking people into CAS to edit them. It's not working as I had hoped.
I changed a human to a witch and it seemed to work ok. She could practice spells.
Changing a human to a werewolf I didn't get a option in CAS to edit the werewolf form but they could change to a werewolf in live mode and do the other werewolf stuff
That's all I tried with humans so far and they seem to mostly work.
Tried changing a vampire to a werewolf and again no option to edit werewolf form. Back in live mode he was still a vampire Could still hunt, read minds and drink blood. Same thing when I tried making him human.
Also tried changing a ghost, werewolf and a genie and after taking them back into live mode they was still the supernatural they was before editing them in CAS.
So far the only one it seems to really work on is changing a human to something else. The rest may have to rely on potions and spells to make any changes.
If someone else tries this with better results I would love to know.
And I was trying this with a mod free game.