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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Stormallers need a nerf in both range to their supers and a reduction in armor. There is no countering them when they rush you and chain lightning to your allies stupid enough to rush them.