It is both a buff and a balance. If you buff a priest available to each faction in equal measure, it can be considered a balancing buff. Seems like this argument has devolved into semantics. Joemog simply feels priests in general should not be buffed whatsoever even if the buffs are in an attempt to balance the factions.
I personally think the more back and forth we cram into this thread, the less likely the devs will be to go through it. Hope we hear some updates on the long-awaited combat rework soon.