The idea is nice, though execution has some drawbacks - the one with most impact is inconsistent lighting - the illumination and shadow on the ships has differences inside the fleet and does not match the shadows on the planet. the planet has heavy clouds, but the Shofixti have bright sharp illumination. Shofixti don't have the orange reflection color one would expect from the planet and the clouds. Shofixti Scout ship looks much bigger than Yehat Terminator, when it should be 4~5 times smaller. I am not an artist and could not make it at least as good as you did, but you know that everyone is a critic!
I hope my input is constructive...
The Yehat Terminators are on 60-90 meters behind the Shofixti Scouts. And I forgot to lighting the image.