i think would kinda make some sense if the flash bang actually blinded people for a couple of seconds (1.5) making it still useful but not instant kill my only concern is would make killing mobile flankers harder.
Anything would be good, but OW instant movement, would make a flashbang rather useless it needs a larger AOE, Slow and possibly a way to avoid getting hit.
But even so, the FB is still one of the worst Stuns in the game. It is horrible, buggy and very ineffective against its intended targets. Flankers.
To me we just need to buff the Flashbang useability, like give it a proximity trigger, some more range, faster cast speed, complete ragdoll of the enemies hit, instead of the insane head wobble of characters like Zarya and Mercy.