It seems, diplomatic reliability checks have been improved. Yesterday, I canceled a war that I had started because the target had become a client state of an ally of mine. Before patch 9, this would have resulted in a reliability hit. Now: no change in reliability.

Tech trees have been rebalanced. Rome, for example, no longer has a tech that gives +50% to ammo (or I might be missing something, LOL). Others (players of different factions) report similar techs having been move higher up the tech tree.