A few chime in's relating to Sona
I'd like to see her Q aura effect abilities as well and not just only auto-attacks so that it feels more satisfying to use on people other than people who auto-attack (I made a longer thread about this here : http://boards.na.leagueoflegends.com/en/c/gameplay-balance/E7gfP2bG-a-sona-change-id-like-to-suggest)
I'd also like to see her aura's improved so that they're more impactful and noticeable, like I'm pretty sure most people think those circles underneath Sona are just for decoration. I want to feel the fantasy of playing Sona more, buffing your allies with your music, I don't mean to ask for just straight up buffs or something, but I want her to feel better to play.
Her power-chord's could also use some looking at as well, maybe. Mostly her W power-chord.