the ai art is not that bad 

The AI Art seems to be mostly placeholder stuff until they can draw it themselves, there is also like what 4 times it used in the whole game with the only reoccurring one being the newish character of Kaia already having a non-AI larger version in the files. The AI Art will be like how the original sprites/images of the playable characters were based on an image pack that was modified to be pregnant, and now they have been redrawn to be original art pieces instead. The music, on the other hand, probably won't be replaced as PP doesn't seem to create their own stuff. They don't appear as musically talented as they do compared to art and writing, and unless they plan to profit off the game in the final release, there is little reason to replace the music.