sona's ult needs to be changed
Why on earth does one of the squishiest champs in the game have a close range Aoe stun for an ult? And what's more, why does:
Syndra have an aoe ability with the same stun duration except longer ranged, potentially larger, and as a basic ability with ~45 seconds less cooldown? Amummu have an objectively better Sona ult? Leona have an ult which, while stunning in a smaller area, also slows in a larger area, is longer ranged, and melds well with her q and e, both of which stun (I think, e might just root). "better sona", or Nami as she is commonly called, have as ult which while not stunning, knocks enemies up and slows them, and is a huge Aoe which can be launched all the way from the back line while sona has to flash into the enemy team.
The point I am making is that her ult is extremely lackluster compared to other champs. You can't have just an Aoe stun and call it engaging and unique. Adding the aesthetic of enemies dancing is just that. Aesthetic.
Is the ability iconic to her kit? Yes. Is it a good ability or match her kit in the slightest? No. When she is reworked, this really needs to be changed.