I'm waiting on a full set of PVP gear before properly making my judgments on PVP healing in this game, but from what I've seen right now, it's quite bad.
Between the awful UI, the high amounts of damage which I'm hoping will be fixed with PVP gear (note: horrible players shouldn't be able to global a healer, it should take some modicum of skill from the dps), Huttball (worst invention ever) and the absurd amounts of knock backs/stuns/pulls it isn't that great of an experience.