Well, it is a better design than the original Kestrel.
There is one glaring problem: The facade of the shield. I don't know if its just me, but while the "shield" that I see covers the entire ship, the actual shield is much smaller and is outlined by the defense drone. This causes some parts of the ship (cloak, teleport, bridge, part of the engine, back airlock) to be effectively exposed to ANY attack outside of the real shield.
Yeah, you need to fix the shield ellipse and the room sprites. There's a big list of things that FTLEdit leaves not particularly well done, and the shield ellipse and room sprites are near the top of the list.
You ought to be able to use images that already exist in the ship/interior directory for the pilot, shield, drone and oxygen rooms. The 6-space rooms (engines and medbay) are new so you'll have to edit an image yourself for that, but it's really easy to do.
Was doing so well and I was defeated because the shield flaw by the Overpowered Ubercruiser known as the Rebel Flagship. So sad. Apart from that issue this is my favourite ship so far.