It just a noob friendly mechanics, and they are putting way too much such stuff into the game, that make it annoying.
You should not take player kills.
Horizon is the other totally noob legend. Zero skill to use with incredible broken mechanics. Both her ult and her tactical are annoying ....
Just throw your ult and spam nades, such a skillful move.
One of the top Pros(controller player, forget his name atm) was saying the exact same thing, and was pissed hard time about her.
ShivFPS has been annoyed with Lifeline auto-revive so many time, i mean he is the 1v3 God in this game, and the time you see him dying in pubs in 1v3 situation is 99% because of the Lifeline auto-revive .
Just think of any fair angles, and you will see all that is wrong with this ability.
And Lifelines main should not be mad. Im not saying she needs a nerf, she needs a rework. That bad mechanics needs to go, and she need prober rework. Better tactical, better ultimate, and not totally annoying passive. Her old passive was pretty much solid, tho im not okay with faster heals on all legends.
So just rework her completely.