For the record I am a holy pally that raids in BT. What i think blizzard needs to do is not give us a AoE/HoT heal but improve the way we currently heal. They should improve the tools that we have that others dont to make it so people want to bring us.
We also now have Bacon of light.
Theres lots of ways of doing this.
Make it so purify also heals.
If you bubble someone it heals the target for X-X.
Decrease casting times of FoL to 1 sec and no global CD.
Take the instance FoL everytime you crit you get a crit heal form the ret tree and give something like that to holy.
Everytime you crit gives back x mana/rage/etc to targeted player. So now we have the chance of helping more then just healing.
I used to say we need AoE or HoT heals but then i should just roll a shaman/priest or druid. Now i just think they should make it so our type of healing is wanted.
Im sure alot will disagree with me and that's fine.