uh ok 2 points i see at the first spot open Fuel Tanks and the generators = one hit BOOM whole ship gone
If you like having your tanks visible (not a good idea, because the reasons in the post above mine), you can put windows around them, and just leave a small part exposed so you can still fill them. The windows will absorb some fire, but won't last forever. But yeah, exposed fuel tanks = quick and fiery death.
Some feedback with the intent to help you improve this design: - Missiles converge on your crosshair far better than any other weapon; I'd swap them those to the outsides on the wings and move the gatling guns to the inside. Having gatling guns/laser rifles on the far sides of your ship makes hitting something really hard. - Fuel tanks; I tend to cover these things up fully. If I have to refuel I'7ll take one block apart, fill 'm up and place block back again. We have the tools to do this, it's incredibly cheap (you even get the mats back when using R&R tool) so why not? - I'd lower the generator/fuel tank one block altogether (if possible).
