All I’m gonna say is that Mercy is supposed to be an entry level hero or a hero you play when you don’t have the energy to play more mechanically demanding ones.
Her having “carry potential” was broken back then and it would be broken now.
She has always been the most popular healer however I doubt anyone would want Mercy GOATS to be a thing at the moment. Back when GravDragon was meta, if Mercy had Mass Rez she would’ve been a must pick.