I can see your point totally. The cost for recuperate is enormous considering the amount of health you could have restored instead. I don't like it a lot, but in Frontline as a tank/melee it helps you get away as your need for health is not as immediate as other roles. For squishier targets it may not be as effective though. I personally would rather prefer the 30 second cooldown, alongside a type-matching crowd control immunity after being afflicted with one. I'm talking mostly Frontline here, as it is my favourite mode. (For example, if you get hit with a stun, you can't be hit with another stun for 5-10 seconds, but you can be hit by slow or sleep etc.). It existed in the game before as Fetter Ward in Frontline, and I miss it greatly