Not bad, but a little hairy in spots. Started a little hard, too many explanations of things that were too easy. Almost like it was our first TOS exposure. Once that calmed down, was better.
Yeah, the first thirty pages or so come off like a very low quality
Starfleet Academy book from the '90s. Something more aimed at younger readers than an adult tie-in novel. Like you wrote, it did gradually improve.
Little jarring that when Nelson has his moment, Kirk forgets that he had a crewman onboard. Literally no mention of him again.
Sulu and Chekov go missing after a scouting mission for FIVE weeks and Kirk doesn't bother to search for them because scanning inside the nebula would be "too hard" and, hey, they can take care of themselves.
Why on Earth would he believe that they were fine or not captured or possibly killed? Were his conversations with faux-Washington that important to justify neglecting his crew?
Not bad, just felt like the characters were a little off. Would have preferred to drop he demiurge thing and focus more on the dead civilization they had already set up. Them and the Pirates went nowhere
This novel is filled with a lot of set-up and little pay-off.
The pirate/slavers.
The ancient civilization/slavers(?).
The Demiurge that is introduced in the final few chapters.
The crewman you brought up (that the author even made a point of addressing his presence on the NE ship in a scene).
The three week timeframe for the assault that Chekov and Sulu were desperately racing home to advert...until they weren't anymore. But that's okay because -- even though their trip took FIVE weeks -- their return was swift enough for Kirk to launch a pre-emptive strike before any sign of the pirate/slavers.
Another draft of this novel with a bit more polishing and tightening of the plot and the book would have been a much stronger work. But, as is, it's an fairly un-satisfying read.