You've got to cut them some slack in that department.
In the end the model and the effects are there just to give us an "idea" of what is going on. If we're going to examine every single model shot in this series then we're going to have a LOT of questions. As to why the size of the Stargazer is so great compared to the Ent-D (when the Constellation would be much smaller in comparison), the sizes of the BOPs tend to be much greater, starships routinely encounter one another practicaly sitting ontop of one another.
This is anal-ness to a great degree.
Cut-away diagrams have been done fitting the 42-decks into the ship, fudging 10-forward into the saucer-rim. It's what's established as "canon" from what we've seen on screen. Now we must "make" it work while also cutting them some slack.
As Science Fiction fans, all too frequently disappointed by the crap these ignorant idiot producers force on us, I don't think we should be giving them any slack. That's how this stuff keeps coming back on us.
Imagine a movie about the beheading of Marie Antoinette that shows her head being sawed off with a plastic butter knife (because it was a cheaper prop). Would you give those producers some slack?
One of the reasons I left TNG was the constant battles I had trying to get "those in charge" to understand their audience and it's expectations. When the E-D was too large for the ILM Space Dock, the Producers (not Gene, who wasn't in charge by then) shrugged and stated that it was now a larger Dock. When I asked everybody why the guest-ship-of-the-week was ALWAYS too large, they told me it would be hard to see the smaller ship. When I explained that it would show the true size of the E-D,... they shrugged it off. The same narrow-mindedness embraced the nose-to-nose ship rendezvous, with consideration of scale ignored by those who were incapable of understanding it. The Conference Lounge had a door label containing that designation all through the show until the sets were struck, yet Burman suddenly decides to call it an "observation lounge",... so that now is supposed to be canon? Observation Lounges were designed into the rim of the ship's two hulls, and the Conference Lounge was designed for Command Officers' meetings... all approved by Gene.
These people are more interested in placing their own egotistical brand on something than honor the norm, not to mention understanding the concept of continuity. That's why you have different uniforms, weapons, and communicators in every Trek motion picture. Look at the movie with the Regula space station. Everybody
knows it's the Space Office complex turned upside down and they were too cheap/lazy to even change the windows... or they assumed we all were too stupid to notice it. So how does that work? You drop to your knees to look out the damn windows???
That's why spaceships fly like airplanes (except in 'Babylon 5', thank you). That's why the new Godzilla didn't look like it was supposed to. That's why the flying saucer in the upcoming 'Day The Earth Stood Still' will look like a frickin' bubble, and that's why the new Trek movie will look the way it does.
No,... these people are degrading the genre and they deserve NO slack.
Andrew-