Setting the game mechanics aside for a minute...
Healing surges seem to be one of the most contentious things about 4th Edition: the people who love them really love them, and the people who hate them really hate them. Few people are indifferent, judging from the number of comments in this thread and the attached poll.
Clearly, healing surges are one of the things that the gaming community is divided over. And if the goal of 5E is to re-unite the fragmented gaming community, healing surges would interfere with that. This is why I think healing surges should be left out of the 5E core rules and put into a separate, optional book or supplement. Even if I liked healing surges, I would arrive at the same conclusion.
Psionics, dragonborn, healing surges, grid-based combat...keep them out of the core, but make them available for those who want them. Everybody wins.