That's always a possibility, hopefully it will not happen, we will see...until he realizes that he is doing dblwork with little benefits and deletes original art version.
At least he need to do double work only on 3 characters and not on the whole roster.
That remind me about familiar redesign in different VN, after all work steam still rejected the game.
In general from what I read about all this, acceptance of VN on steam seems to depend on the mood of the reviewer - apparently there is one that hate them just because they are VN.
I wish the best to the dev, hopefully everything will go well for him.