You can just change the values manually if you like.
friendshipV=50
lustV=50
etc.
Suffixes (V, K, etc.) should be self-explanatory.
I'm not sure how ren'py code works (never used it, but am a Java/JavaScript, PHP, SQL programmer), but it may be more trouble to create an object just for that instead of the few variables already existing; especially considering the dev's native tongue is not English to begin with (i.e. the variable for "strength" is "strenght"). I'd rather they focus on the story and getting the bugs worked out before making cheat-grind easier.
Please don't get me wrong, it's definitely a good thing to ask for and would be cleaner code on their end. I too have been doing this with the console (enabling it) for every game I get. I just wanted to enunciate that English is not the dev's native language and changing that now may make updates to content take longer as well as possibly introduce new bugs throughout the entire existing game, both of which could (as I've seen before) plunge the dev into a rut of boredom and then not finish the game even roughly.
Just also wanted to make sure you knew about the workaround, as I have no knowledge of your level of coding/console experience. I hope this is all taken in the friendly, helpful manner in which I intend.