Hm, even though the design isn't my taste the various classes show a uniformity. Its not easy to create a whole line of ships, which have a uniform look, but differences in detail.
Interesting design. I like it, but for one thing: the fighter looks too much like the caps. If you look at every single other faction, there is a noticeable divide between the styles of the caps and the fighters, and for good reason. Fighters are designed for different things than caps. I'd say give the fighter some wings. Apart from that, though, I rather like them.