To fix healing and have healers lean more into a more focused role on healing rather than DPS, they will have to totally change their mentality on encounter design. Right now its all about memorization and repetition. Most content is predictable, in some cases, laughably so. I cant do it as I have a horrible memory but if I could memorize 15 minutes worth of content, it would be fairly low impact. I would like to see rezzing be made instantly and then a 60 second CD timer, more AOEs but not too harsh. Near removal of all one shot kill mechanics and replace them with DPS reduction mechanics or slows, a long ticking dot, etc. As it stands now, the encounters move so fast, its just not practical to use a GCD heal because I'll get caught in some AOE or other mechanic and die, same with rezzing. There overuse of instant kill mechanics, falling off, ROUND platforms, etc. Its time to change things up and square platforms are not a solution either. Every time I see a raid or trail boss now, it feels like the developer is saying "hey look at this cool raid I made, can I go do the next Ultimate now?"

So really... I don't think healing is the problem, the jobs are good and pretty fun... its the ENCOUNTER design that's the problem. They have forgotten the most important thing in encounter design... FUN. Start with fun and then make it challenging, instead they make it challenging and hope its fun. Well... its not. Story mode raids and trials should be easy and fun for the casuals, hard (Yes add a new difficulty mode, call it hard) and savage for people who want a challenge with ultimate being around for people who want to cry tears of blood.