Mythic Ebonthrax Greatdragon Shield - doesnt seem to impact knockback

I do not have the full Mythic Set, but I don't yet see the difference in having the Mythic Ebonthrax Greatdragon (bracer) equipped vs unequpped,
if there is a difference it is only like 5% less knock back, but Ebonthrax still flings me to the very back wall on occasion,

Like a pinball in the machine, right into the jackpot... ZZZSSSHUUUU ...BAM.