Well I am glad I wasn't able to get Rome 2, seems like a disappointment. ›››
Based on the opinions of people like AngryJoe and a community crying over Broken battle AI, not like Shougn 2 didn't have the same problems.
The campaign AI is quite improved in Rome 2 versus Shogun 2, and the battle AI, while completely broken in sieges, thanks to piss poor path finding, is better in open field battles then Shogun 2.
Also Diplomacy is for once in a TW game more then just: "You conquer a lot of lands we hate you" and "Dump tons of cash in our laps and we love you".
Optimization of the game is the largest issue atm though, and that's something only CA can fix.
The political system is interesting however, also loading times are vastly improved.
I will say that despite the Siege Battle AI issues coupled with the optimization issues Rome 2 is my favorite Total War game to date.