The ONLY problem I have with Holy Priest regen this tier is NOT our regen mechanic itself; but the fact that there are no options for spirit gear from the Firelands raid. That means that for this tier, holy priests are forced to wear ilvl 378 gear that has spirit and no heroic version or lose regen. This also means that Holy priests have less spellpower and mana than other healers JUST to have the same regen as them.
The dragonsoul raid appears to have spirit items in it's loot table.