I think what healer dps really needs is to be slightly more complex. Sch is fun because it was based on the core of a dps class. So it's more engaging that whm and ast. Job gauges were a step in the right direction and I think if they started weaving a simplified version of what dps have for healers people would be more engaged.

Sch is a good framework to go from since the fey gauge benefits from the use of dps abilities (mainly bane) as well as healing abilities. introducing a similar concept to whm and ast would be a nice step