Honestly I feel Oni just wants to stop making the game but doesn't want to stop raking in the Patreon money. Which is why he keeps making characters ugly, disfigured, or weirdly out of proportions to slowly turn us off.
The problem with Oni is, and it pains me to say this, is that Oni just isn't a very good artist to begin with.
I just browsed through his pin-up catalog on rule34 for the first time and was not impressed. It's obvious that he takes real-life images of porn then just traces over them to get the poses he wants, ala Eva Kiss. While doing this technique is a fool-proof way to get your anatomy "right" it is ultimately a crutch that won't teach the artist in the long term if you just use it as training wheels. It's a bit lazy, honestly. Oni's been in the Erotic Art business a long, long time (at least since 2007 so certainly before that) but his quality of images hasn't progressed all that much. Comics and cartoons are all about knowing when to exaggerate for effect. If you copy poses from a photograph, it shows, and tends to take the viewer out of the experience. Also, much like Eva Kiss, Oni doesn't make good choices for light, color, and shadow. His color renderings and backgrounds have all the dynamism of an episode of Peppa Pig.
Not to just take a huge steamy dump on Oni, I'll give him credit where credit is due. His models and poses for Rogue, Kitty, and Laura are excellent, and some of the greatest examples of his work. Oni can produce outstanding erotic art if he puts his mind to it. No one can take away the original girls from Oni, and without them, Rouge Like wouldn't be the success story that it is. Another thing that Oni has going for him is his writing. His dialog trees are pretty damn funny.