I was as surprised by the news of Dave's new gig as anyone else. At the moment, I know nothing more about it than the general public does. Honestly, if I had any inside information, I'd probably be keeping my mouth shut about the whole thing for fear of letting something slip. Indeed, maybe I should shut up about it anyway because I don't have anything to offer but guesswork.
Oh, I see what you mean. Probably it would've been more like the fate of any early tie-ins to a new series that end up looking weird in retrospect, like Ghost Ship or The Children of Hamlin, say. After all, the comics were telling a serialized narrative and had to try to fit the movies into it, whereas tie-ins to a series in progress tend to be standalone and easily set aside if later canon conflicts with them. (There was a subtle continuity among the early DS9 novels -- surprisingly apt, given how that series and its tie-ins later developed -- but it didn't last long.) Had our books come out, they would've just ended up being more standalones that later canon rendered obsolete.
Ironically, you picked the first Trek novels I ever read, and ones that to this day contain some of my favourite and most memorable bits in Trek novels. They fit well enough as post Farpoint stories, but the things go in a radically different direction. The other best bits are in Metamorphosis and Imzadi.