Fallen Angel Healing is not about topping the meters, Healing is about having everyones life toped. Rej is super for this, because sustained dmg income is healed sustained and spike dmg income is healed with swiftmend. In every Fight situatin where you have to expect high spiky raid dmg you should have a raid full with RJ, example Malygos P2 when changing the Bubbles. Or Kel'Thuzad throw it on the healers for Frosttombs, in addition if you have replenish the have more mana to waste on what ever needs heal or will need heal. In addition RJ will often heal the aoe Frost dmg. With the RJ idol you can heal with RJ while almost loosing no mana.
And RJ does heal a lot more now than before the 6 sec cd on WG, you heal the targets CoH cant anymore. And if you talk to your healing mates, they will configure their Grid to see your hots, and wont overheal them.
Rej is the most mana efficient Heal for raid heal, and when other healers do the job you dont need to do, then you got to many healers with you. You could try to dps. 2k dps is more than useless.
Even if i wrote on the top that Healing is not about topping the meters, it is easy to top the meters as a heal druid.
my only problem with rejuv is that it is slow to apply healing. it depends on the situation but when there are several people taking damage and you need to get their health up quickly then waiting 3 seconds between rejuv ticks isn't always the best option. of course it depends on your raid make up, our guild was hit hard by the WG/CoH nerf because we only have one semi active resto shaman. if i'm on raid healing along with a priest or another druid on fights where there is bursty raid damage (3 drake sarth or maly)
i find that relying on rejuv too much leaves the raid vulnerable to death and i my swiftmend CD is just never up fast enough. i usually go with regrowth and then mix rejuv in when there is no burt to heal. wtb resto shaman /sigh.