Well the center piece of modern porn would be bits and how they animate, the rest of that stuff is important but not as much so.
Ya know why, most people (as in the consumer) don’t care, don’t know any better and don’t want to know. But yes improving the visual quality, framing and such would help to a degree. But again not much.
Ya know why, look at a live action hub site and look at the modern trash thrown out and how popular it is.(not saying you literally have to do this but trust me here) Poorly lit, no editing and bad acting. But people(the consumers again) love it to death and spend countless time watching it.
Back in the day I remember porn had stories, and scenes where they build up the characters, they had some simple cinematography, period costumes and great scenery. Not so much anymore(most of the time).
But yeah a lot of the creators of 3d erotica could step up their game a lot. But there are some out there that have gotten it together, but erm its still not for everybody.