There is a fair dollop of this. People very often tend to conflate their personal taste with quality.Quality is in the eye of the beholder, so saying quality has declined unless there's obvious things like poor editing is really "They don't happen to be publishing things I want."
OTOH, I went very much the other way for Spelljammer. My players have zero interest in ship to ship combat. And, over the years, I've found that players almost never do. At least in my experience. They want to play their characters and ship to ship combat means you get to spend a fair chunk of time not actually doing that. So, I simply leaned into it. All effects cannot pass outside of gravity planes. No attacks, no spells, nothing. So, all ship to ship combat is boarding actions because you can't really affect the other ship until such time as your gravity planes intersect.both those points are fair but not all are skilled in the latter and sometimes new rules are needed, take spelljammer it need far more ship rules for the basic set of things you can do and basic guidance for any of the most common ideas beyond those.
not to say I want a new rule for everything but sometimes you want to do something properly and an expansion is the only way to do it.
So, extensive ship combat rules would be of no use to me. I HAVE extensive ship to ship combat rules. Several versions for multiple editions. From very rules light to three steps away from Star Fleet Battles. And, every time I've tried to use any of them, the players have completely turned up their noses.
And therein lies the rub. How is WotC supposed to write supplements that make both of us happy?