Artwork def improved from looking at that post.
Lots of nice little details and the fidelity just seems way higher all around.
The one thing I always wanted to see change in this game was reusing the nsfw reactions more so we do not have to play through an hour of content to see some tits.
Planning out the hentai content so it is reusable interactions with different NPCs even from different races is a good move in that direction. Spending dozens of hours illustrating an interaction that will be used 1 time only in a game like this seems like such a huge waste and it is a problem in all hRPGs.
Repeatable scenes with great artwork which have lots of little variant pieces built in for variety is smart hGame making. Princess of Zeven does a good job of this (even though the machine translation for that game is absolutely awful - a new translation by kagura is due later this year)
One other thing related to that... In games where sub / dom or sluttiness or mind break can advance... It would be great if more creators started to plan those systems to be fluid either way - so for example: in a game the PC can become more and more mind broken through choosing slutty interactions, while also gaining a reputation for such acts - this leads to more and more sex scenes. Make it so that this can be reversed through some sort of process - be it a quest to change reputation, a trainer or mind alteration mechanic that has an NPC bring down mind break / sluttiness - or just make it magical or something.
Games should have a good story that has satisfying progress, but also plan all of the art assets to be reusable and repeatable, while also having an advancing path where new artwork is unlocked through progress. But make lvl 1 interactions still accessible even if you have access to lvl 10 events (for example). I wish more games were planned this way.