Most word first progression also use white mages in heavensward. That didn't change that white mage wasn't part of the meta.
White mages always had more bursty AoE dps compared to all the healers. They were arguably the best healer for speed running dungeons. White mage becomes more powerful the less amount of people they have to heal while the other two healers scale with more people on a group.
But the amount of white mage personal dps doesn't make up for +10% group damage or +20% crit chance that AST and SCH bring.