The next update (not the one that will come to itch.io in a week and a half, but the update after that) will give an overhaul to the goddesses to make them stronger.
As for images, they will come, but there's been delays in getting the images due to the fact that the artist has been very busy. I was recently contacted by him that he should be able to work on them somewhat soon, but when that would be I am not certain. I deeply apologize for the delay in the images, irregardless.
Viewing post in Demon Lord Alice (Finale Overhaul Update) comments
Sort of. The artist that he's talking about has a rep for many years taking forever for the images. In fact, this game would have been fully completed last year, had the artist delivered. This game kind of has no choice but to stick with this artist, other wise all the art would have to be overhauled and replaced by a new artist.