AI agressivity still has to be toned down. In my current game as Rome (or should I say Neapolis?) the Etruscans rose out of the ashes rebelling against the Senones in Carnia (25% Celtic, 75% Balcanic). I was just about to take the region from the Senones and was a bit taken aback by this odd revolt. So I thought I'd just bide my time, my legions needed rest anyhow. Most likely the Senones or the independents with armies in Carnia would take that region back anyhow and I would march in in a few turns...
One turn later the Etruscans declare war on me...
In the meantime the Celticii have risen out of the ashes apparently from the independents I'd seen in Carnia the previous turn. I bet next turn they will declare war on me. Meanwile I'm waiting for the now territoryless Senones to launch a suicide attack from their Raethi subjects on my now united consular armies plus mercenaries...