I'm not saying in a vacuum; I was following up on the idea of her becoming a full support character, since that seems to be how people are seeing her. Obviously she would need to be retuned.
Just the general idea of health backs being sufficient on their own for healing seems unlike to me, but it's something I hear a lot.
To follow up with what Chmpocalypse said, make sure you are happy with your sensitivity settings. I YouTube'd some videos about how to find "my settings", looked at what pro Roadhog players were using, and did research on mouse pads while experimenting a LOT in training mode, and I eventually found a setting that easily bumped me up a few hundred points in rating.