[ZeroAdunn]

Suggestions:

Battleship: Building on the battlecruiser design, extend the top and bottom panelling back so it covers the engines, cut out the edges where the side panels are, making the top and bottom armor panels a t shape. Then cut out a section in the middle and add some sort of weapons collection coming out of it.

Dreadnought: I would just make it a massive block. Where there is the top and bottom armor panels, with sections cut out of it, and weapon groups connected to the center components via struts. Fill out the front with various weapons ports and do the same with the sides.