OWL Stage 3 Pick Rates:
https://www.winstonslab.com/customquery/pickrates/?onlyLANs=on&dateGreater=2018-04-02&dateSmaller=&event%5B%5D=86&specificMatchupTeam1=0&specificMatchupTeam2=0&team%5B%5D=&map%5B%5D=&roundtype%5B%5D=
The only two heroes with a higher pick rate than Mercy are D.Va and Zenyatta - both of whom were nerfed. Does Mercy need another nerf to be balanced?