Yeah, I'm not really sure if the updates allowing for naval invasion actually help or hinder the AI in the game. I mean, Portugal does have that unholy obsession about sheep, and if they accept a cease fire, they just sit there blocking traffic for the next 20 turns until they attack again. This is also evident on Ajaccio. Whenever I take it, it ends up with like 5 armies on it (Pope, Sicily, Venice, Moors, Spain) none of which really do anything.

On another note, I really wish the naval invasions would be more spread out. How about the Portuguese coming around and hitting England in Caen? Or the Moors landing in Southern France? The only reason not to do it is the plain annoyance of a major landing behind your lines in an area which you don't expect, which in my opinion might make the AI worth something.