what i notice too, if you use a 1h weapon

Rune Pulse +105

Champion/WardenLevel: 15

Uses: noneRange: 150

Spell Type: Physical/Blunt

Casting Time: 2.00 sec.Cooldown: 6 sec.

Inflicts 411.1% main hand weapon DPS Earth Damage to target. If used while in the Shield Form state, inflicts 846.8% main hand weapon DPS Earth Damage instead. When it hits, it will restore 5 rage. When it hits successfully, cooldown time of Charged Chop and Power of the Wood Spirit will be reduced by 2 seconds.

ID: 1490702

Doesnt lower the cd from cc and pow right as it see for me, maybe you can test it too.

Yes I know with 1h the cd get only lowered 1s but its seems for me he doesnt even do this always. Sometimes its working.