Not to give offence regarding what you said, and what you said was, in spirit, correct, but I have a strong suspicion that PC's writer is not so much becoming good, but may very well already be a professional.
Whoever's penning this gives a lot of cues of already being in the business, and possibly doing this as a side route. There are a lot of VERY polished bits in his writing.
I could be wrong, but I did focus creative writing in college, so have some experience w/this, and there's a lot of evidence here of someone who knows what they're doing and already has the end planned out and is working the characters to meet the plot(s), with a LOT of details working seamlessly towards that end: details that would have needed careful consideration and judicious juggling beforehand, to all line up. This includes a fair amount of philosophical introspection and debate that would be flatly missing from a less polished work. The writer has seriously thought this one over: REPEATEDLY, I suspect.
It wouldn't surprise me if he's the sort of person who runs through conversations in his head beforehand, and he very much smacks of someone who's been writing for quite a while, possibly professionally. He may be in the porn business or not; he may have a more "reputable" writing career outside PC.
Again, that's mainly just an impression I'm getting, but it's a pretty strong one, gleaned from considerable and consistent evidence. People just dipping into writing tend to be a LOT more clumsy, and hack writers are, well, hack, and he's kinda not.