I totally agree with the Kusari Destroyer in vanilla being overpowered. A fix is a good Idea, but the resizing was... a bit overdone, in my opinion. While being in the cruiser class for mod terms, the ship is namely still designated as a destroyer, which in turn makes it reasonably smaller than a normal cruiser.
Also, Kusari already has a heavy ship filling the role between Battleship and Destroyer. Scaling the ship to this size makes it more into a heavy cruiser, which is nearly the same to a battlecruiser. And thats a ship we already have, don't we?
The ship now being on par with the Rheinland Cruiser (Which is already one of the biggest cruisers) and the Bretonia destroyer (Which in my opinion is completely wrong, should be called Bretonia Cruiser for all I know) seems a bit arbitrary. The resize posted first looks like a good middle ground. Why not just take that?
The KuDessie is as big as the Rheinland cruiser, has less hull than the Siege Cruiser, and the same powercore of the Siege Cruiser, giving its size no advantage. Not in hull, nor in power. Not only that, none of its larger guns can aim backwards. Which means I can just float behind it in L I T E R A L L Y any solaris gunboat and murder it.
Bravo, you made a hard-to-hit but otherwise subpar cruiser into flying garbage.