There is nothing to manage for any jobs outside of savage and ultimate. Again, not a healer only problem. Looks like people enjoy ignorant what actually happen for other jobs.
You won't tell me you don't have to manage anything as healer in savage week1. After that the gear make the diff.
For your second part, what do you want to keep on your game as a dev? The minority that probably gonna stay (or at worst leave but whatever) or the majority ?
In fact, the problem aren't jobs only, they are fights too. Atleast I feel (and I insist on feel, maybe I'm wrong) fight were more engaging. But since they nerf everything anyway, even basic dungeons, taking off mech too.