Eh, I'm still mixed on things. I was a Paladin that used all my spells before (I used HL, HS, FoL, and SS all the time.) Now that things have changed, it forces you to switch around. HL is too weak to keep tanks up forever, but FoL is no longer the quick heal, mana efficient spell that it was.
...in an odd sort of way FoL is more useful than DL...which is ALMOST useless. However, due to the mana inefficiency and FoL being made so powerful, Paladins have even less potential as raid healers than before - at least before you could FoL several raid members. Now you have the cone effect LoD for that, though. Although it's Holy Power based (meaning if you have no HP, you have no group/raid healing button), and we don't have healing radiance yet to give us a group/raid heal. So we won't know until 83 if Paladins will be able to do that or not.
Paladins will likely still be relegated mostly to Tank healing, but without the super mana efficiency we had for it before. That said, with HP Word of Glories being mana free, that may make up for it some.
Realistically, DL seems kind of redundant to me. But that's just because it's not THAT much less efficient than FoL and doesn't heal for THAT much more. Also, 3 Holy Power WoG heals for close to the same amount at present. That said, if you have slow but large/sustained damage, DL is more efficient for the long run than FoL.
Basically, here's the "rotation" in a nutshell:
-HL tank (thanks to Tower of Radiance, this will build HP in a somewhat mana efficient manner.)
-HS anyone else that needs heals (and if no one needs them, either HS the tank or enemies...you should use HS on every CD to generate HP.)
-If the tank is taking high, but slow, damage, use DL.
-If the tank is taking faster damage, that's too high for HL, use FoL.
-Use WoG whenever you get 3HP if a single target needs it, else use LoD on whoever you can aim it at.
-IF you have 3 HP, use either WoG or LoD - there's no benefit to stocking HP UNLESS you know there's about to be a spike of damage and you want a powerful instant spell on standby (this is also the only reason ever to hold back on a HS instead of using it on CD.)
-Use Judgement whenever you're doing nothing else. ^_^
That's basically what I've come to so far. There's more intricacy than that...but it's more...annoying than "intelligent". I will agree that to be a good Paly healer takes some thinking now, but it's less "If you use your brain, it sets you apart!" and more "If you don't use your brain, you go OOM and everything dies. If you DO use your brain...uh...you do about the same as before."
To me, that's not really that great of a trade-off, especially since I DID use my brain before.
...I mostly blame them making FoL too potent and removal of SS (and no, the Mastery is NOT Sacred Shield.)
In the end, it doesn't reward intelligent thinking so much as it punishes FoL spamming. Overall, I'm not sure that's an improvement. Most people saying it is are just trying to sound smart/diligent.
Paly healing now is still functional, but we're still pigeonholed as tank healers, just FAR less efficient at it than we used to be. Though I'm still waiting to see how things are at 85 before I make any final judgment calls.
Note: For the record, judgment is spelled judgment, not judgement...but the in game spell is spelled judgement. ^_^;