I mean despite the fact that outside of a few art changes, it's basically the same game with significantly more dicks on the screen. I believe the game was suppose to be free for those who bought the original, until the Dev decided to monetize it halfway through development and that's why it is only a few dollars shy of the game's original price... somehow. It's pretty crazy that the game is 14 when it really feels like it should just be a cheap 5$ DLC at best.
But in that case, it's a problem with lack of content, not necessarily a problem with re-used assets.
To better illustrate what i'm talking about, just think about the Yakuza games. Every Yakuza game re-uses like 90% of their assets, yet they add tons and tons of new content in every entry. So, as a result, you have a game series that always manages to stay fresh despite wearing almos the same coat of paint every time.
Pink Art Café decided to make what is supposed to be a DLC add-on to the previous game into a brand new game. That should be the problem here
To compare an obscure porn game to a triple A release seems a bit weird.
Originally there wasn't any dlsite or ichio versions planned. Two horns was a drm riddled patreon funded project (then it was banned and switched to subscribestar) and you had to be subscribed to get updates. That version also includes Oniga town of the Dead and is uncensored.
The drm free, one time purchase, Dlsite and Itchio versions were "seemingly" a direct response to the complaints about drm and pricing.
But nobody pays for censored, offline, drm free porn games, unless they specifically want to support the dev, the game's development, or want to reward the removal of the drm.
So why would it be weird to put a pricetag on a big update?
Normal consumers aren't paying, they are here.