So the thing about the STXI engineering that I most remember was the multiple warp cores. I took that idea and sort of ran with it: I checked, and it actually does barely fit inside of the secondary hull of the TOS enterprise, with the smaller "tunnel" at the end of the engineering being right in where the nacelle pylons meet in the hull.
Nice. Why is the inner bluer tube missing from the back left warp core? And I would add railings to those stairs. We have seen people fall to their deaths in Engineering during a battle...
For that matter, where do the stairs go? I'm guessing those windows on the second level are either some sort of observation/control room, or else the corridor? Either way, it looks like you're onto something good here.
The consoles down the center seem randomly placed. Shouldn't there be the same number of consoles aligned with each core? Each core would have its own team running the same tests and monitoring the same readings on their particular core, then one or two consoles down at the far end collecting and comparing all the data to keep everything in sync.
There are actually 4 sets of consoles evenly spaced, with a fifth pair being in the chamber at the back. Thanks for the complements everyone, I'll continue to refine the design!