I'm having three war-related problems with the new version (latest hotfix):
1.) The AI is extremely reluctant to make peace. I've been at war with Assyria for a veeeeeeery long time (over 50 turns), I have a positive warscore (varying from 5-10) and he still refuses to make peace with me, even though no cities are in danger of being taken etc.
2.) War weariness. Despite the changes to war weariness I don't feel any difference. I've been at war with Assyria for over 50 turns, haven't lost a single unit, had only 3 tiles pillaged, didn't kill anyone outside my borders and yet I'm at 14 war weariness at around turn 110. Since I can't peace out (see point 1), I'm now below 50% happiness and I imagine soon I'll be below 40. I thought the changes were supposed to mean you don't get war weariness from killing enemy units if the enemy is unwilling to peace?
3.) City state units are extremely passive with barbarians, which means barbarians are more raging (good for Authority, bad for everyone else).