So nations in WW1 built far more capital battleships/battlecruisers rather than smaller cruisers ? I doubt it.
Yes that is true, and after the war EVERYONE was building battleships and battlecrusier. Look at the OB for Jutland, there are virtually no cruisers, it is all battleships and battlecruisers.
It makes no logical sense to buy subs over battleships and cruisers are worse than both unless you want long range.
Increasing the cost to 14 would fix this and/or giving cruisers the bombardment ability.
You probably have not figured out the value of long range movement for cruisers yet. That’s ok, once you figure it out just like Flashman and tanks you’ll see their value. They are definitely need dependent, so in some cases, not as valuable (don’t buy) and in others, will be a real threat.
Subs are of value for several reasons, first is soak off, but two subs are capable of getting two hits in combat, where a battleship can only get one. Also, don’t discount the ability of subs to move unhindered through enemy sea zones and not have to stop. Again if you have not done it, you probably have not seen the value.
All this ships have special abilities that will be of value in the right situation. If it is not an immediate need for such, you will probably just build a battleship, and that’s fine, cause that’s what the Great Powers where enamored with.
Larry did a good job with this.