I have suggested this in the past, even before they added houseguests.
I still like this idea, but now I would rather they add more ways to earn free or achievement linked house guests.
But houseguests doesn't allow any creation process.
It's like to come macdonalds and to eat cheesburger instead of cook something delicious if u enjoy the process ofc...
Here are elements of roleplay, visual experiments, it's way to create much more uniq house atmosphere