Having rewatched a week ago, I'll admit it did look a bit smaller than the entire Baku village (doesn't that mean they're screwed if people wander too far from the centre?), but still big enough to count as a starship. And isn't it called "Federation Holoship" in the script? You can believe what you want, but IMO Insurrection was definitely the first time Starfleet hid a starship from natives underwater.
I'd say III was the first Trek movie to use a lot of humour, and hit the serious/funny sweet spot which the later movies emulate. "How many fingers am I holding up?", "Don't call me 'Tiny'!", "Get in the closet!", "Nice of you to tell me in advance" etcIt is the last truly serious classic Trek film, honestly. TVH was a comedy, TFF just as many jokes as its immediate predecessor and something about TUC was extremely silly: the drama was blunted by some heavy handed humor
interesting observation..quite true Treks1-3 were deadly serious with just the odd bit of banter...with the success of IV its as if they thought trek films must be boarderline comedies!... The same can be applied to the TNG films as well as the JJ films...