I haven't had any bigger problems with the new AI yet(will update if changes), but I am really disapointed with this nation "balance", I really wanted to switch to the French over the Romans before update, but I was still waiting for a nation balance. Well, it is here and I am so disapointed that the French is the only nation which requires to have an alliance. So you MUST have an alliance to use that poor bonus, I hope you will rethink this and change it as soon as possible. Thank you!
UPDATE: A next thing I recognized is that the game crashes even more on my device (Sony Xperia Z), but I had already used to it.