Now because of the fact that if you even think about spamming your quick big heal, you will oom, how will healers ever be efficient/useful in PvP. You will be able to keep the flag carrier alive for about 3 seconds, until your forced to type "/bg oom"....
I for one am interested to see how this pans out in Arena, as i certainly believe we will see teams of 2 dps succeeding over 1 healer and 1 dps.
All in all, the dps players can pump out, simply isn't healable at this point in time, thus rendering healers in PvP useless. I guess the benefit is now, that you wont win WG based purely on the fact of how many healers you have.
Thoughts on healing in PvP?