Great picture @OP
That being said, I got a lot of problems regarding the capital ships.
1.They seam unfinished, lacking details, or low res details.
2.You can get very close to them, try that in the real world, you will not make it, if a carrier drops by your local waters.
3.They are always alone, these capital ships should have an armada of support ships following them.
4.They don't move, just sit there.
5.No voice comms from the cap. they seam very lifeless and dead.
6. look like a placeholder for something great to come (one can hope).