I don't PvP myself, but I've heard that holy paladins are dealing quite a bit of damage in PvP. I kind of like my damage output for soloing, but...well, here's my suggestion: if holy paladins' damage output is more than a healer ought to have, or maybe it's coming too quickly, then what if Denounce was changed to work with seals, and then some of the damage from Denounce and/or Holy Shock were instead rebalanced into Censure?
Here's the idea: if a Holy paladin had to get Censure to 5 stacks before that damage output really started to show (and if Denounce applied Censure when Seal of Truth was active), then there'd be some ramp-up time for the Holy paladin to get his damage going. In solo play and questing, this would mean about the same DPS overall. In PvP, this would mean it would take about 5 global cooldowns to get any solid damage going---i.e. it wouldn't happen very often.
Also, if seals were tied into Denounce, there would be other bonuses for solo play. For instance, if Seal of Righteousness caused Denounce to be some kind of AoE attack, that would be very helpful for leveling or for solo situations where you're mobbed by lots of small enemies with low health (like versus the piles of rancid meat in the Isle of Thunder dailies).
It's a thought, and it might or might not be necessary, but I figure it's worth putting out here.