The problem (including #healerstrike) is that the healer role is just not that fun or challenging, and generally unneeded for a LOT of content.
Imho, it is because the devs painted themselves into a corner:
1) If you make it so healers are crucial, then there's too much pressure on when/if they die, which..
2) Makes people not want to play healer so...
3) You make the tank able to survive without a healer, even though it takes forever.
This is easily alleviated by giving raise to more jobs so that the healer can die without much penalty, as long as someone else can "save the day" by raising the healer.
This would allow enemies to hit harder and allow healers to die if they screw up, but not cause a single healer death to sour the duty for everyone (aka healer dies and we all die...or we all just sit here for 10 minutes waiting for the tank to solo)