Patch 3.21 changes to stun calculations?

In patch 3.21 it states:

"

Stunning enemies has become too trivial with the amount of hit damage the majority of players regularly deal. To combat this, we've made it harder to stun enemies with hits for almost all skills - however, since Melee relies on stuns more than other archetypes for survivability, the ability for Melee Attacks to stun enemies has remained untouched.

Has this changed the base stun formulae? It seems like quite the oversight to simply state this without giving further details in patchnotes.

They did change stuns, but I'm not sure what they did to the stun formula. Here's some ingame testing. Setup is the Frenzy skill with a bow or sword, a set amount of damage from Bloodthirst Support, no conditional stats/buffs (3 minimum charges), hitting a level 15 normal Kraityn's Aspirant (151 maximum life) with enough overwhelm (80%) to ignore its 157 armour.

31 melee physical damage
3.20 stun formula: 200x31x1.25/151 = 51%
3.21 ingame behavior: 110 stuns in 220 hits, 50%
(Seems correctly unchanged.)

31 ranged physical damage
3.20 stun formula: 200x31/151 = 41%
3.21 ingame behavior: 52 stuns in 200 hits, ~26%

38 ranged physical damage
3.20 stun formula: 200x38/151 = 50%
3.21 ingame behavior: 79 stuns in 205 hits, ~38.5%

76 ranged physical damage
3.20 stun formula: 200x76/151=100%
3.21 ingame behavior: 217 stuns in 310 hits, ~70%

Thanks, that testing should be enough to work out what I need. It looks like they've probably put a 0.66 or 0.75* multiplier in there for ranged. The reason I was curious is that I intended to use Warlords mark to generate rage and the only way to calculate how often it'll proc is doing it manually based on average hit as PoB is limited in this regard.