Ships are overpowered !
I stationed 1 ship of the line on the Indian coast ( later upgraded it to Ironclad ) and was able to kill whole invasion force with just this one ship.
Muskets, cannons, cavalry dieing from 1 attack of lvl 5 Ironclad- 3 x land bombard promotion.
When my Ironclad got Logistic and could attack twice it turned in to masacre...
With that 1 ship + frigate for escort and 1 embarked musket I was able to conquer huge Indian empire and kill 100 + units.
2 units vs 1000 and the AI couldnt do anything >_>
Not only that but ther is a SECOND ( i hope its a bug ) logistic promotion for ships and my Ironclad ended up with 3 attacks per turn.
A "1 man army" if u ask me.
There is not much we can do about the "AI" ( actually i wont even call it AI), but the ships need to be nerfed. Unit penalty worked fine. True that in late game, ship bombardment was kind of weak, but it was still very usefull. That and the fact that AI have no idea how to use ships for effective sea bombard support.
-50 % vs units for ships - maybe -25 % for "battleship" class could help here.
And ofc removal of second Logistic promotion.
Sry for twisted post ^^