One of the reasons we quickly provided the .73a patch was the discovery that we accidentally gave the Casse - as their cheap, starter vessel - the Poeni Penterai in v.73. They absolutely annihilated every other vessel in the north atlantic, baltic, and anywhere else they cared to sail. The coastlines of all Europe were their oyster.

(So aside from the "complete fantasy" problem, this would very likely have increased the number of their invasions)