I like trying to make connections and I can't help but feel that the warming of the West Pac and the West Atl is causing high pressures in the western basins to migrate further north causing a feedback mechanism that is resulting in these stuck patterns. I think this will only change when we see a massive melting of the ice caps and an influx of cooler water into these basins, which, ironically enough might reset everything to the old pattern (at a higher level.)
Nature does self regulate through feedback mechanisms even though it might do it in a way we don't want it to.