Concerning the late battleships,it seems that ratios are more real there.Cruisers are off in all eras i think,and dreadnoughts also i think can handle way too much armor.(didnt comprare with rl design yet).But i have present 2 cruisers from 1930s that are waaaaay to armored compared to rl.Rember these were washington era cruisers with light armor values and still they broke 10k tons.While ingame i get 535 mm on ATAGO