You cant really say “prove me wrong” after stating an opinion.
Mercys high pickrate, good winrate, and good usage in OWL show me that she is better now than she was before. 2 dozen or so people complain on the forums daily about not having fun (just pick a diff hero ffs) but millions are out there enjoying Mercy.
In my opinion, she will not and should not see a revert or rework. She’s set for now, and its time to work on heroes who actually need work like Symmetra and Torbjorn.