If you look at Overbuff (some statistics are better than no statistics at all), her pickrates were slowly dropping during the month, they went from 9-10% to ~7,5% this week, and her winrate sits a bit below 50%. Perhaps Mercy buffs and orb nerfs were already doing their job?
I wonder what her state is going to be once these changes go live - it takes some time for the ladder to adjust. Is she going to be as bad as Bap or some extra % in wooden ranks will keep her pickrates somewhat visible? Will forums be flooded with complaints about braindead lock-on like nothing changed the day after the patch? How fast will we see threads demanding hps revert for the undeserving hero? This is going to be pretty entertaning, even if the reason is sad.