Is nobody yet bracing for a change in the upgrade award chart (incl SWUs) that truly limits upgrades to 1-cabin? So no more Y-to-J. I suppose that’s not in the context of “changes you’ll like” per the OP, but it’s inevitable, no?
That said, if perhaps they concurrently allow complimentary/ sticker upgrades from Y to PE for elites, in-line with the domestic upgrade program, maybe that’s a reasonable enough offset. And frankly, given PE pricing hasn’t been that much terribly higher than Y, requiring PE to upgrade to J isn’t really the end of the world.