*The hull form is reasonably good, though I'm not sure if you have armor on the belt.
No, the belt is an aesthetical feature.
*The superstructure and funnels and after armament is a bit cluttered, stretch it aft and you could condense some of the funnels.(they also are terribly thin, remember at speed, those things have to belch volumes of smoke and soot)
Aren't most WW1-WW2 destroyers rather cluttered similarly I.e Clemson?
*IIRC those torpedo launchers are very wide, I'd recommend putting them between funnels
They are triples rather than quads for that reason if that is possible.