So Torquemadra you say '' it adds 15% crit to all abilities when you use a great weapon '' i will show you its not the same crit its broken because it give you another stat crit hit and he not merge with your crit chance.
First look my stats without this tactic

you see my MeleCritChance is 14 (9 from Renown points + 5 from weapon and boots )
So my Melee critical bonus is 14
Lets see what happen when we put our tactic Oppressing Blow

We now see a new line in our stats and its call CriticalHitRate 15 (0 + 15) <------- This is our tactic Oppressing Blow
Our MeleeCritChance is still 14 but the Melee Critical bonus is 15 why ????? every one tell is a visual bug but its not i will show you why
Lets try to use a Pumpkin Pie of Savage Vigor (it give 60 toughness and 5% melee crit chance) without tactic Oppressing Blow

And here you see now our new stat CriticalHitRate is gone
Our MeleeCritChance is 19 (9 Renown point + 10 our pumpkin pie, weapon, boots)
So my Melee critical bonus is 19 and there is no visual bug its show correct stat
And now i will show you the same when we put our tactic Oppressing blow

It show our CriticalHitRate 15 (0 + 15) <------- This is our tactic Oppressing Blow
Our MeleeCritChance is 19 (9 Renown point + 10 our pumpkin pie, weapon, boots)
And what is with our Melee critical bonus it say 20 ??????? so tactic Oppressing Blow give us 1% crit chance ???????????
Torquemadra I know I'm an annoying guy like a dog looking for a hole in this mess but can you explain me for what we need the stat CriticalHitRate and how it works and why its separated stat, is this CriticalHitRate merge with MeleeCritChance ?? Why we can get simply stat 15 % MeleeCritChance ????