She also there in what I assumed at the time were her own beliefs into the characters mouths in either this of the TSFS novelization, with at least Sulu saying "oh gods" at some point.
Not necessarily her own beliefs, but perhaps just her speculation about what religious beliefs might prevail centuries in the future. It's never wise to assume that writers put their own beliefs into their fiction. Stan Lee and Jack Kirby wrote a lot of comics about Thor and the Norse gods even though they were both Jewish. Chris Carter created
The X-Files, but he was actually a nonbeliever in UFOs and psychic phenomena; he just thought they'd be fun to write fiction about.
Novels and novelizations were a LOT of fun in those pre-restrictive days. I haven't read a Trek novel since forever, so I have no idea if they've gone back to that since Roddenberry died and Richard Arnold was bounced.
Novelizations are still kept under pretty tight leashes by the studios, but original Trek fiction has been given far more creative freedom over the past 25 years or so than it was under Arnold. We spent the first two decades or so of the century building a whole elaborate post-series continuity, although most of it has now been overwritten by the new canon established by
Picard, Lower Decks,
Prodigy, and the like.
I guess you weren't a Boy Scout.

On camping trips, it was common to send younger scouts to neighboring sites to get "left-handed smoke sifters." I was the target of one such prank and instead of being laughed at, the older guy at the site gave me some makeshift tool and sent me back to victory.
What puzzles me is the "snipe hunt" prank. I mean, the basic premise there is that it's a fool's errand, ending with the pranker saying "Ha-ha, I got you, there's no such thing as a snipe" -- but that doesn't make sense, because there actually
is a variety of bird called a
snipe, which is actually the thing that snipers are named for because they're elusive and it takes great skill to hunt them. So how can the prank be based on the putative nonexistence of a snipe?
I'd understand if it were something like a snark -- but we're not there in the novelization yet.
It goes in line with my belief that the filmmakers were taking the approach that the Enterprise is OLD. And the shiny refit in TMP is either irrelevant or (more likely) didn't happen. This is more of a spiritual sequel to TOS rather than TMP. Things look different because this is a movie made in 1982 rather than a TV show made in 1966. Not because of any in universe continuity reason.
Right, and the only reason they used the TMP sets and ship design is because they were on a tight budget and had to reuse assets from TMP. Given a higher budget, they probably would've built new sets and miniatures from scratch, same as they did with the uniforms and props.
As for Morrow saying the Enterprise is 20 years old: Star Trek was 20 years old (nearly, or including the pilots exactly - i.e. how long Nimoy had been wearing the ears) and they didn't want to bother the audience with the math.
I'm well aware of their rationale, and have been for decades. You can understand the reason why something was done and still think it was a bad decision. I don't buy the "don't confuse the audience" rationale. I mean, viewers of "The Menagerie" weren't confused by the reference to the
Enterprise having been in service 13 years earlier even though it was a first-season episode.
And yes, you can look at it as a metatextual wink to the audience about the series's longevity, but I feel that metatextual references need to make in-universe sense too. Yes, the majority of the audience wouldn't care as much as the hardcore fans would, but I object to the assumption that only the majority needs to be considered and that minorities should be left to go hang. I believe it's important to try to satisfy the
whole audience as much as possible, to appeal to a wide range of tastes and perspectives. It's not a binary choice between one audience and another; the ideal should be to tell a story in a way that satisfies
both the general audience and the core fanbase.