Never played Shogun (Only Medieval I through Medieval II, can't play Empire and onwards because of PC requirements), but I think it's a good move. I can't see how they can move on beyond the Civil War, but retain their core gameplay elements.
I hope that they focus a lot on the single player campaign. I hope that there is a heavy emphasis on the importance of supply lines, morale, desertion, etc, and the ability to win a battle or war, without actually fighting.









