How many times have you had this happen: You have been spamming your recuperate key, you have full mana, or near enough, even though its oGCD you haven't cast anything else and you have no GCD either, and it still takes 3 seconds of spamming for it to actually work. Hope you aren't already dead.

Seriously the terrible lag induced by this games netcode should be an embarrassment for a company the size of SE.

WoW had this problem... 10 years ago. They fixed it over a decade ago. Surely it is not beyond the means of a multi dollar company like SE to fix their games terrible input latency.