So, you want to improve... The right choice you've made!
Currently only average 3 stars, but...
1) Cannons on this ship are useless, too weak. If you'll get caught by anyone willing to fight, you'll most certainly be vaporized. You should focus on speed instead. Make her go as fast as it's possible at all (Reactor Mobility chamber will help you)
2) Docking collars without USDs? Strange...
3) The thrusters. They look terrible... Know what? Try replacing crystals with ice and add some charged circuits in the middle (ONLY!!!). That will give your thrusters some lovely glow.
4) Plain hull is plain hull, no matter the size/colour it is. Detailing is necessary even on such a tiny craft. Try grating/slabbing/piping/adding ribs etc her, that should improve the looks
