Because it is not balanced.
Video proof, yes?
[u]Why was blink strike's range (and perks) nerfed but this was left untouched?[/u]
[u]Why was Scorch Melee nerfed to shit but this was left untouched[/u]
[u]Why was Harambe murdered in cold blood when all he was doing was holding down the city?[/u]
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Because it's a perk specifically made to make a warlock melee very powerful