The Planetina stuff was okay. It filled the gaps (ooh err) that the TV show couldn't, but I think she's a one off character, that I'm not really interested in seeing again.
I loved the new Beth content, but yea, be nice to have option to ditch the condom. Also, an anal option in the cinema would be quite good, I think.
Regarding the scene order for your Renpy version, I saw this on the main thread ...
View attachment 1404915
... and I played it in that order, but I think for the sake of story continuity, it works better if "time for your punishment" comes first, and then the Planetina scenes. It makes more sense.
I had an idea, while watching the Beth scene that comes at the end of the Planetina bit. Beth asks Morty for something to wipe up the mess. Instead of Morty grabbing his t-shirt, it could have played out like this ...
Morty: "Don't worry mum, I don't mind"
Beth: "But Morticia sleeps in here"
Morty: "She won't mind, she's used to it"
Beth: "What do you mean she's used to it? Have you been having sex with your twin sister?"
Morty: "erm ..."
Beth: (shouts Morticia, and calls her into the room)
... I think you can guess where it goes from there.
I'm not expecting you to implement this, as I imagine it would require a lot of work, but it would be a fun twist and gives us a nice Beth, Morticia, Morty threesome scene.