I agree, too, that compared to other tier bonuses this is kind of a lackluster one, not only in terms of throughput but in terms of creativity (although again, that’s based on looking at the bonuses and not seeing how they feel in play).

Renew is usually 30% of my healing. CoH is 25%. So 10% over 25% is at least a bigger improvement than the original 5% over 30% would have been (glad they changed that). When I play disc, PW:S is usually around 50% of my healing, so 5% * 50% balances it out pretty well (though I do use shields as holy too, if there is no raid-healing disc priest, but not much).

What bothers me more is when I compare it to my shaman. My shaman tier 10 4x bonus is 25% increased critical strike bonus on chainheal. With roughtly 30% crit, that’s a 11.25% bonus on an abilility that can easily be spammed 3 times in one cooldown of CoH. But just the fact that chainheal is a “bread and butter” spell is already saying a lot compared to CoH, which is just one of many. A shaman easilly get’s +50% of his total healing from CH, so that’s 11.25% * 50%, compared to a priests 25% CoH healing * 10%.

The 2x tier 9 priest bonus however, now that’s a real bonus, so I would probably stick with 2×10, 2×9 myself and forget about the full t10 set.