I'm not sure that there is really much to discuss at the moment. The clear leading hypothesis is that the gradually warming base state has hit a "tipping point" with a dynamic response that just happens to be associated with increased SER/WAR. The exact mechanism(s) of the coupling are unclear but could include overly warm waters in the Gulf/West Atlantic, the Pacific warm pool, the expanding Hadley cell, some combination of all three, or maybe something completely different. Deciphering it all could take years or maybe a decade or more as we observe the new responses through various ENSO/PDO states. Until then, all we can do is hope some mitigating natural trends weigh in our favor.
Or else we could all chip in to purchase a ship that just sails around the midlatitudes spewing sulfur particulates into the air.