I'd be willing to bet my housing plot that little to no impactful changes will be made to WHM come 6.1.
At most, I see Assize getting an MP buff to 8-10% and Misery getting a slight potency adjustment up to 930 potency and even those 2 minor changes feel like a tall order to believe in.

I don't trust the Devs to make WHM better. They've spent so much time and effort to screw over WHM in every expansion that the adjustments that happened in ShB felt like an oversight and they've overcorrected it in EW.