No, I mean it won't port saves from an old renpy update to a current one.
As for the placeholder, you should have just went with the futa; then just worked the camera angle differently. Or, put in an option in the game that lets you choose what is the person's preference.
Then make two or three different versions, depending on the choices you place and go from there. It can be right at the very start of the game, right before you put in your characters name.
I'm saying that because the placeholder makes it look like the game is unfinished to an extent. I'm not trying to be rude and hurt your feelings or anything, just honest.
Either way, the game has come a very long way! From questionable and shaky at moments, to enthralling and enticing. I'm excited for whatever changes and updates you make! :)