I only agree because as a healing character he is out stripped by quite a few others; however, if he were to be given a different secondary ability where the "Attack as Defense" ability did something like say heal Protection...well then he is suddenly a unique healer. He is credited in the game as two things, "Jedi, Healer" to which every other healer has some unique ability (which they all get a turn reduction at some point so you can't call that unique), in most cases I find that his and Luminara's healing refreshes at near the same pace.
When you look at all the other healers their heals have some special ability to them except this guy...so why not add at later tiers in his ability upgrades to either heal protection with his "Jedi Healing" or "Attack as Defense" especially when most are commenting about using him for Galactic Wars which your healing gets stripped away in the first or second round never to return.
Overall he has been part of my build since day one and I doubt that will change any time soon, I would just like to see him gain a truly unique skill to his heal or secondary attack.