This is already in the mod, courtesy of BBB.
I don't think so, but I plan to place more starting forts in each campaign.
Anti-Popes, this would be ideal
We tried to limit crusade/jihad targets to historic places, but I will review them.
This is in progress, and more mercs will be made available via the AOR buildings as well.
IŽd also love lithuania and the teutonic order put back in the game...but u already know that
This would be great
The AI already launches seaborne invasions, at lease in the case of Venice and Genoa. I have actually observed Venice land invasion forces in Corfu, and actually bring in reinforcements over multiple turns before attacking