I personally enjoy healing Frontlines, albeit I feel damaging is rather pointless at 60, I don't even see why a killing blow would matter when you only contribute 2% if lucky of the persons health pool, not including cliff kills. I tend to CC, barrier up and buff dps in my alliance so they can get battle high and ensure our defence stays strong for the inevitable A/S ranks during the match. If you buddy up with a good DPS it can be really fun, also helping other Alliances who don't have healers feels game changing.

As for what could be improved, a tweaked Cleric stance for PvP would be nice (longer lockout so its easier to punish or something), or healer specific rewards would be awesome.