you could have posted it here: What are the main things you want to see fixed from EB1 in EB2???

that's the appropriate thread.
Spoiler Alert, click show to read: 
but I would like to add that the AI does get quite upset when you enter their territory in M2TW, they do not immediately declare war but they get pissed off. - in my first game I played HRE and by moveing my FL into the empire, I got a declaration of war from the Milanese :(
what I'd howeer find nice would be that the AI would honor the players Territory, or at least give a dialogue option to get them out(diplomat)