i play tw from original medieval and i think CA(really thank you for the happy hours) makes good steps in development, i really enjoy m2, but campaign ai has its flaws, maybe not a game killer but sometimes very unrealistic. In my current campaign(egypt/m/vh) a crusade called in jerusalem and above adanna in the only and narrow pass for the holy lands i have a full stack with mamluk horse archers and boom... 3 full stack crusading armies(england/venice/hungary) dont dare to attack me and continue their purpose or attack the poor garisoned castle of adana to gain a foothold, they stuck there in front of my army for about 8 turns in the mean time in testing a turkish army comes with a simple unit and atacks hungary crusading army and the crusaders retreat...
i feel that the game is siege oriented and not even succesfull with that(known issues of poor garrisoned castles and buggy battle ai) but i believe with patches/mods later we all gonna have good times