Tbh as negative as I come across on the topic, I absolutely wish healing requirements were sent to the moon. Selfishly I'd love it and frankly I do think that people will adapt to it with a little time. We adapted and managed with rough mainstream content such as Titan HM, Bardam's first pull or some of the nastier 24 mangs++
The reason why I am so negative on the idea though is because frankly I don't think it'll happen with Yoshida at the helm. A) The guy has no interest in healers & B) FFXIV has become ever more beginner focused as the years have gone by. If we get another MMO from him I'd be very surprised if it follows the trinity at all, I'd fully expect a GW2/Early BnS type situation where everyone's HP is their own responsibility for the most part.
(I genuinely do hope he proves me wrong on this one).