Nice but now it looks like its "under construction" due to the parts you've added.
Now to make it better:
1) The gaps in the head (helmet) - put windows there at all areas.
2) The side "gaps" - fill them with armor (to extend the whole body in this way) - all these new holes I mean.
3) Fix the hangars to be more rectangular and not visible from sides (that can be fixed with step 2) when u fill the gaps with plating).
4) Add a small "belly" bridge that controls the hangars below - similar to the top one but just below the backward part.
5) Put some "fins" at these side engines, to look more detailed and covered with something.
6) Keep this "skeleton" parts visible (they look nice)
7) Maybe slightly extending the "armor shell" will be nice because it still looks small. Currently it have 4 shells, make them 6 - from the forward one up ahead. It will make it look a lot bigger.
For inspiration I made you this image taken from the concept art from the FL disk - its some kind of "bret cap ship" but it have x2 side hangars. Just in case you would like to test with something new or implement parts from it. Anyway, when you are done with the next fixes, can you put comparison image with the model next to kirk and current carrier?
PS: Look the below "belly" engines from this concept. Would be nice to make similar parts which contain your engines and put them where the current side engines are located.Their design resembles "fins".