For large ships that are huge, in the new update you may be able to circumvent having to downsize ships by making them split into modules, that way the game may register them as seperate entities, i don't know if that's right but if it is you could always make a 3 part giant battleship out of the segments you already have ^^
The really scarily big ships in the sprite dumps would be usable if that's the case too, and I love all of these mods that just add new ships <3