Numbers aside imagine you have a scale from 1 to 100. 50% of the time you have 50 and proportionally lesser chance if you move to 1 or 100. (with a super small chance of 1 and 100) This is what we have now.
7.2.5 Is the same scale but the middle is 75. From 1 to 50 is a guarandeed damage buff. 75 is 50% chance and proportionally lesser chance if you move to 50 or 100.
we had 24% so 12% dmg buff 50% of the time, in 7.2.5 it will be 8% guaranteed dmg +8% random dmg(up to 16% not 24% we have atm), so 12% dmg buff 50% of the time and 8% dmg buff 100% of the time. kinda reminds me about removed destro trait from beta. it's not old mastery but it miles better than current one
Considering + 20% dmg buff on everything and embers i don't mind that change at all.
Also last but not the least