Everytime i read about the " Orbs that kill you "instantly" ", i cringe. Yes, they can kill you. So can Syms turrets, Torbs turret and Junkrats trap. Any of those - including the orbs - kill you instantly? No. But i BET that all of you were killed faster and easier by Sym or Torbs turrets. And it's way harder to outrun them.
If you don't run WITH the orb it will NOT kill you if you still got like 50hp left. Don't 1v1 her in a tiny room where you can't get away from the orb. None of her kit slows you down like Syms turrets do and you don't have to fight against a turret with lots of health AND the Engineer who repairs it.
And another thing: Do you seriously want your - most of the time - only healer to stand in the middle of the enemy team to charge her healing juice to do her job correctly???? Do you even know what you're asking for? "Yeah, Healer goes suicide mode to get my sorry butt the heals i need! What a splendid idea!!"
And I KNOW that the ones who want all those nerfs are the very first who scream for healing.