Interesting...so are you and the other writers collectively deciding where to hold the "present?"
You'd have to ask them. Aside from
The Struggle Within, I've pretty much tended to be on the periphery of the post-
Destiny continuity, so I don't know who's making the decisions about when the stories are set. It could be the editor, or it could be the individual authors. I know, for instance, that Kirsten Beyer is making her own choices about pacing in the
Voyager novels, and they're still in the latter half of 2381, not jumping forward with the rest. So I'm not sure "collectively" is the word. It depends on the project.
I'm curious about the process because it is true that many of the novels stayed in the late 2370s and early 80s for a long time. Was that just happenstance? No one bothered to move the timeline forward much? Or was there a consensus to sort of hold the line at a particular period?
The timing didn't shape the stories; the stories shaped the timing. Things like the DS9 post-finale series and SCE had a serialized approach, and so they tended to tell continuous stories that advanced gradually rather than leapfrogging forward. But at the same time, Christie Golden's post-finale
Voyager novels advanced six months in just two duologies, with a three-month jump between
The Farther Shore and the first
Spirit Walk volume. Whereas the Shatnerverse just jumped right over the DS9/SCE timeframe and went directly from 2375 to 2378. So it depended on the needs of each particular series and the preferences of its authors or editor.
I suppose it's possible that the books stayed in the 2370s for so long because people were reluctant to push things too far forward from the latest canonical productions while there were still others in the works. We knew (and by "we" I mean fandom in general, not some organized cabal of authors) that there would be another TNG movie after
Insurrection, and we didn't know what changes it might make to the universe, so probably few authors were willing to push beyond whenever it might be set (which could be pretty much guessed, since the in-story intervals between TNG movies approximated the real-life intervals). But I think it owed just as much to the preference of editors like Marco Palmieri and Keith DeCandido to tell serial stories, which by their nature tend to advance gradually.