

I mean, the largest holodeck ship I can think of was the one from Insurrection, and that was specifically designed to secretly abduct a whole population without their knowledge. I don’t think it would work for exploration or combat, just transport. I think they started incorporating holoemiters into systems on all decks by the time of the Enterprise-E, but they were supposed to be supplemental systems, not replacements.
I just don’t see how these holoquarters would improve much. Like, what real-world things are you replacing? You’ve already said that they need to have real-world seating and beds (and I’m going to go ahead and add bathrooms to that list), so what are we phasing out? Clothes and personal effects? Sure, you can replicate a new uniform every day, but it’s probably a waste of energy, and you wouldn’t have space for sentimental possessions.
Being able to go on some sort if multi-player adventure sounds cool, but I think most people would prefer to able go out to a real bar with their friends rather than go to a virtual bar from their bedroom. This is starting to feel like how Zuckerberg tried to replace meeting rooms with VR meetings. I think most people would rather go to a place and see someone real face-to-face.
And holodoctor or a holographic patient interface is even more risky. Even if you assume that a holodoctor is just as good as a real doctor (and there’s really only been one EMH that was), or that a holographic version of your patient is exactly like the real thing, all of the problems with holographic medicine I mentioned get even worse. Imagine being halfway through surgery when your doctor just dematerializes.
I actually think finding a bureaucratic loophole in a treaty to force your opponent to negotiate is a pretty great example of diplomacy.