Can we look at sona again?
I've tried playing sona and she just feels sub par. Prior to her rework she was a lane bully and provided decent sustain but would run out of mana. After however she feels weak at all stages of the game.
Her heal feels pretty weak early and doesn't get much better unless the target is pretty much dead which at that point its probably too late. The shield the aura provides is small and doesn't scale well either. Not to mention to get the shield you have to hug sona.
Her E which is about granting ms requires you to be again hugging her. If you're in a situation that you need to run and sona is ahead of you she has to stop or go back to speed you up. If she is behind you you have to wait for her to catch up and kamakazi you for the speed boost before it runs out.
Her Q cd feels too long and too weak. The aura portion enabling bonus magic damage on next hit is nice but in it self feels weak and is often used on minions as opposed to poke.