Needing 1 healer for 2 or 3 people is why arena died. You can’t sustain that ratio. Even on retail with solo queue you get huge queues.
They should have went harder on bgs if they wanted to please the larger crowd.
In bgs it doesn’t matter much if one guy has Shadowmourn you still need group coordination, I’ve seen blue geared coordinated groups beat really geared people and being able to get really good rating in bgs but hardcore pvp players do not respect bgs because their single player skills doesn’t matter as much.