If they nerf him to the point where he can't do stuff like the epic backdoor anymore, then it's too far.
https://www.youtube.com/watch?v=ooozyf5y5t8
I don't care about how obnoxious he is or whatever, the game needs those things in them.
I mean, if he needs tuning fine, but removing one of the best plays in the game from happening again is just mean. It'd be like limiting Ashe's ult in range so she can't pull off clutch arrows across the map anymore. Or if when they remade Soraka her ult was revamped and no longer gave her a global team heal.
And... and.. I dunno, I can't really think of enough examples, but still, it's one of those things where it feels a lot better if those achievable things stay possible, we all dream of landing an almost impossible arrow and turning a fight around. We all want to be in position to dance around the nexus in a desperate effort to get it down before we're finally caught, and have a chance of managing to do so.
Game balance isn't only about what strengths and potential a champion has to do well in combat, it's also about what inspiration you can give the players, what limits they can stretch themselves to and what potential is there for them.
New Soraka gives me a much stronger ability to clutch save people, I can rush up, and get several of my teammates from low to high health, and if I build for it with summoners (
) and items(
) , and I land my Qs, I can be relatively healthy myself. I have to work for it, but I can turn the game around.
And any champion should be defined by how they turn a game around, whether it's something mechanically intensive they excel in, or something tactical or strategical.