... the Klingons are an existential threat. I can imagine that attempts to contain the Klingons will be a top priority for the surviving powers.
Cool, I hadn't thought of that yet. However, the Klingon Empire is led by Duras now, who is/was a member of Memory Omega and is, thus, a more mature and less warlike leader. He might be able to contain the Klingon blood thirst for some time, similar to Martok.
The Klingons being so extreme in this continuity, shouldn't that propel the Kinshaya into the Taurus Pact, too?