That’s a good way to use it. That doesn’t mean using it for mass kills isn’t its purpose as well.
What is the “The High of the POTG”? Asking because this is the first time I’ve ever heard of this.
And what exactly is stopping Blizz from increasing her charge rate? Idk, man. You keep saying bad design when these supposed bad design aspects can be fixed with number tweaks.
But just because you pull the res of, doesn’t mean it’s a success. It’s success it entirely dependant on the situation. Also, again, you keep saying bad design but these bad design aspects can be fixed with tweaks.
It’s easier to pull of but that doesn’t make a difference. It’s success is still dependant on the situation.
Because it doesn’t offer anything worth-while. It is by far the worst designed ultimate amongst the supports. It was removed 3 years ago for a reason. 
You think mass Res can’t fail to get value? Well… I found the issue.
Hiding counters itself.
Considering how predictable her GA movement is, it really is feasible. You’re sounding a bit hyperbolic tbh. Also, again, unlike other ultimates, you don’t even need to use specific counters to counter the ultimate. All her ult does is reset a fight that you’ve already lost.
For balance.
What? If you have a cast time, you’re giving the opposing team a chance to counter the ultimate.
I thought you would know but I’m one of the main people that propose these changes. Invulnerability needs to go and she needs to get LoS checks.
I thought you’d see me in some Mercy threads. Specifically, this one: