Well, I love these ships! Although I am having trouble trying to use them because the version of the game they are built for is frustratingly buggy. (Doors won't open. Other ships won't render until I am colliding with them.) That, of course, has nothing to do with the author.
My primary interest in these is that they are the first ships anyone published that used the new power system, so I was eager to see how you configured their reactors. This is a proof of concept that a large ship with a correspondingly large reactor, chambers, and thrusters can still have sufficient interior space for shuttle bays and humans. So far I've been prowling around my single-player worlds in large ships that others have made, and all of them are pre-Power 2.0. It's been months since the power update and folks were still posting new ships with the old power system. Thanks for taking the plunge!
Star Trek style warp nacelles aren't necessary in StarMade, but they are a handy place to put reactor stabilizers! That satisfies one stabilization axis, anyway. Looking at these has given me some ideas about how to tackle that problem in my own design efforts.
Lastly, I just want to comment on the quality of your art. You use color very well to decorate each ship individually as well as to set them apart from one another. I have issue with some of the transitions from white to grey to dark grey, because of the way the game renders shadow and lighting, but different systems can have different settings so it is possible that I'm not seeing what you are seeing. My instinct, however, is that you optimized for a distant appearance, not a close-up, and they look great from far away.
Additionally, your pictures of these ships presented in this post are wonderful! Not everyone knows how to take clean images of objects with good distance and framing. As a photographer, this really grabbed my attention.
I look forward to seeing the finished product! Hopefully by that time the game will work well enough for doors to open and other structures to render in a timely fashion.