That’s fair, and I think Starfleet HQ fits that bill. But I think (at least in my opinion of architecture as an art form, which I think starship design falls under, since people live and work there), I’d be frustrated to work on a Saturn class if that big hole did nothing, and made navigating between any two places on the ship more of a pain. That said, with personal transporters, maybe it’s not an issue (assuming this ship isn’t near any action that could make personal transporters inoperable). Maybe it would work well as a sort of diplomatic vessel, where having all these rooms with windows facing into the ring (like a giant round table) could be artistically conducive to discussion. Maybe they have a bunch of huge holo emitters in the ring, and they use it to project the current speaker, or just cool holo-art when not in session.