If you have changes in the pipelines for Sona, PLEASE do one thing
Make her more difficult or have a higher skillcap
And it really feels that her low difficulty is the core problem of her ( doing well without knowing jack anything, invisible power ect... ) If she is ever a higher tier champion, it's a problem due to how easy she is to do everything she needs to and little effort is put into her playstyle If she is in a bad spot, she is terrible against organized players because her weaknesses are so massive, and is okay against solo queue players