Since naval update, seems people completely stopped building good looking ships and instead aimed for shitty cubes with terracotta hulls, i think the fault of this is extremely high resistance of terracotta, which means cannon damage has to be adjusted to terracottas resistance, leaving concrete and all detail blocks one tap, therefore people want to armour their ships as much as possible to get the highest win chance, before, people had nice ships, and it didnt matter if it had details or not
my suggestion is :
reduce Terracotta Damage Resistnace
Reduce the Damage of all cannons used on ships
what it does :
makes cannons less likely evaporate your entire concrete hull, detail blocks, etc, will make ass dreadnoughts slightly less efficent, it would not affect terracotta at all