And here we go again, people looking at %WR to justify anything.
The runes need to be balanced, not Sona.
Leona is able to do +500 damage at level 3 with her rotation combo, that's two stuns, +500 damage, and she now has superb defenses at the time.
Well what about others?
Nunu doing +3.3k damage on his ult that was only charged up for 1.5 seconds. Not even fully charged and it did that.
Sion not even focusing on anything other than turrets, is an infinite Rift Herald, accumulating a ton of deaths but single handed carrying games from ulting and destroying turrets.
Rengar doing 80% of someone's HP in about a second at level 2.
The list goes on until the last champion.
I'll say it again, the runes need to be balanced. And they will be, it's preseason. Make changes to champs after the main problem has been settled.