That's actually exactly what I was thinking of. A layer of challenge that doesn't revolve around pattern memorisation or twitch reflexes, but involves a party acting as a party: each member considering the actions of the others.
It's very challenging, but it's a challenge that doesn't rely on your ping.
Edit: Don't get me wrong, I don't think SE will make resource management a serious obstacle. This thread is more for the discussion of it as a concept in MMOs in general and how XIV is an example of a game without it.