Sona (A Rant and Suggestion)
Sona feels very strong. She scales damage and heals off the same thing (AP) and gives bonuses to her entire team. Lately, although I don't play much bot myself, the bot lanes I've been playing with get wrecked by any adc with Sona as a support. I watch as Sona hits one button (doesn't even have to click a champ) and sends out massive damage to two champs at once, then heal her adc with another press of a button a second later. Literally the most no-skill champ you can play.
But I digress my rant. What I'm getting at here, is a simple nerf. Scale her Q with AD instead of AP. You have to then choose if you want to be an actual support or not. She's just ridiculous right now.
A more complex nerf, or even an entire rework wouldn't hurt either. Being near champs and pressing single buttons takes no skill and is toxic. Unfortunately, with the amount of skins she gets I doubt much will be done about her. She's loved by many.