Stance of the Sturdy Ox now increases armor by 125% (up from 75%) and provides a 20% base Stagger percentage. Additionally, the Stagger effect no longer works against attacks which ignore armor.
So, they have uped the base line from 10% to 20% on patch notes now. Making it "only" a 20% stagger nerf (and a armor buff)
So guys, 6.2 is a few months away, and a lot of testing will be done.
A lot of changes are to come in patch notes until it goes live