That's precious coming from a Anna's Affection fan but I'll be glad to let you know the dev of this game isn't going downhill like deepsleep has. Dev already stated the reason this patch wasn't as big hentai scene wise was because it was too demanding mechanically.
I don't know what you mean with the renders in the Ayame and Adriana scene but they're amazing in my opinion, although I always found Adriana to be a bit inconsistent kind of the way Ayame was at the beginning. Also I fail to understand how a bad drawing is the developer's fault when the person who writes the story and the team that draws the images are not the same.
You clearly didn't notice that the Garcias path split last patch so that's why you "thought that something is going to develop between Adriana and Robert Doesn't make any sense for them to go with another guys". That's because you're not even playing the same route anymore. Next time try not to hold CTRL during the story parts, this game's story is actually good unlike Anna's where she's brain damaged and the scenes are pointless
Dev already addressed the reference issue and announced they're redrawing the scene entirely.