Overall, a buff is a buff of course, but this only makes me more pessimistic about the future of Ret. Off-heals are nice, but high-rated PvP has never been about good off-heals, at least not on their own. Shadow Priests aren't good just because of their nice off-heals, they are very good because of their fear, offensive dispell, mass dispell (via mass dispell they are one of the only dps that can dispell friendly targets, considering how few trash debuffs there are in the game now, mass-dispell very often removes polymorphs or freeze traps), they can also disarm, silence and so forth. Ret needs more utility, period; there is no way around it; off-heals are too hard to balance they are either too good in one case, or not good enough in another; a spec has to have multiple dimensions.
The easiest solution is to make repent instant for Ret and maybe on a somewhat longer cooldown (30 sec max). Burden of Guilt should be a root and Fist could be on a 25 sec cd and maybe have a 30 yards range to keep up with a repent buff. But even this does not make us viable for RBGS, where you need more AoE CC, sustainable pressure, and other noticeable utility.