I'm not disagreeing with that. It's why plot armor is horrible, it takes away any actual risk, which in turn takes away a potential deep concern and care for the character.
Correct me if I am wrong, I am not a big gamer, but the champions in HotS are all taken from previous Blizzard games, yeah? So they have their own stories in their own actual games. So if they're previously dead, the players/admirers are already used to that and couldn't expect any more progression in their story.
In LoL, it's the world as a whole and all these champions aren't from other games, but specifically made for LoL. If they kill off a champion here, their story is done. There are no other games to see them in, or any more news and info about them.
And that would suck for fans. While other champions get more info and have stories progress, some champions would just never get any more to them? As a main of that champ, I would be really sad.
Remember how the community was acting when we all thought GP was actually killed by MF? Fuckin' pissed, and not even just the GP mains.
I think maybe there's a way to implicate deaths, at the end of major major story arcs and hopefully not for a few more years. This way Riot can continue to put out new champions and potentially not have to have a huuuge clusterfuck of a stagnant story, but an actual progression.
I dunno though.