The Issue With Sona (In My Opinion)

Well, I'm sure we've all seen plenty of gripes about Sona's state in League, and plenty of proposals to try and fix that. In my time here, though, I'm not sure I've ever seen someone really try and pinpoint the exact problem that is causing Sona to be in her state, and I believe that the following is the case: Sona's kit contains a lot of different useful tools; a movespeed buff, a heal that can also give a shield, a damaging poke ability and auto-attack buff, and, of course, her AoE stun ult. I'd say the reason she's kept low numbers-wise is because she has so much different stuff going on, and if her ratios/numbers are high she can do a lot of stuff really well. I think the solution to this would be to rework her basic abilities to focus on doing one thing really well and better than the other supports, because it offers space for her to be strong and have good numbers, but also she has more deficiencies to take advantage of. Overall, while being a jack-of-most-trades is sort of a niche within itself, it isn't healthy in a game like League, where a few wrong numbers can make that champion totally overpowered and able to do too much, unable to do much of anything at all, or have some abilities that are very strong, and the rest feeling completely useless.

TL;DR: Champions that do too much at once are unhealthy for this game and very difficult to balance, and Sona is sort of in that spot right now.