I feel symm needs her release distance to be shortened or just in general have her be reworked. She's still not good in competitive and unfun in average play. Due to a variety of factors others have mentioned, such as insane damage, large range once locked on, and a tiny hit box she's just annoying to play against through and through. The only things that can generally kill her before she kills you, unless you have amazing aim and can hit headshots consistently, is attacks with large hitboxes. Even then you might not kill her first.
Sure she's not useless anymore but now she's annoying to play against, her kills honestly feel cheaper than Mei's freeze to headshot combo.
That being said I actually haven't played OW in a while.