The entire forum has been filled with negative activity towards the sona nerfs with the exception of people in bronze/silver who don't actually know how to cope with fighting a Sona. Sona was previously a fun champion and had ALOT of negative set backs for the type of champion she was. Like for example, if she poked she also pushed the lane, if she is pushing the lane she has no gap closers. So, the squishiest champion in the game (Besides Anivia) is forced to push if she wants to poke and will obviously be getting a ganked-it means a certain death if she gets hooked, caught or binded in anyway shape or form.
So much counterplay it is unreal for the nerf to even exist, the entire forum was filled with negative activity to the point of a Riot staff member replying to the negative activity and only ignored what the community was saying-stating that the nerf will be going live even if we were complaining about it. Also, i would like to mention this logic that Riot provided us with the nerf and the details, they are 'hitting her early game' but they are only hitting her scaling, which scaling-well . . . scales into the late game.
TL;DR, Riot does not care what we have to say unless if it is about the Lee sin crowd. Lee has MUCH MORE utility than Sona, why don't you consider playing Lee support? You will not have to worry about him being nerfed, because he has a shield that protects him from any nerfs possible. However i will happily help out with a petition.
"For a champion that has her fair share of counters (ex. Leona, Blitzcrank, vocal chords), Sona's pattern lacks significant counterplay when these champs aren't present, leaving her laning phase pretty oppressive. To give her opponents more windows to counterattack, we're reducing some of her skirmishing power so she's not so obnoxious with that harp. Etwahl, sorry. POWER CHORD DAMAGE AMPLIFICATION 50% ⇒ 40%"
-Riot