/shrug - thats perfect. - just a final touch with the texture and its done.
i wouldn t add more to it ( if we think of the destroyer to be sort of equal to the baracuda - it needs to remain a little "plain" & "light" as that ) - it does look the light destroyer indeed - as much as the corsair toolbox looks like a heavy gunboat.
soo, you can think of what you add to the battlecruiser version - and then to the battleship version. i don t think you d be done with adding just a pair of vertial wings and a few wingtips then:). - but i think i d leave that model as it is.