So I looked over the new holy talents and spells (I'm not going to list everything out here, the sources are around enough now) and I gotta say, I found a couple things to be pretty interesting.
First off a Bubbleshield (Like earthshield, except it bubbles the person for 500 damage when they get hit, effect can't happen more than once every 6 seconds) that will be a new spell, not even talented.
The new 51 point talent would be great for spothealing, however there seems to be another talent that's even better. It's in the ret tree, but not so deep that it's unviable. You just can't get 51 points in holy to get that talent.
Sheath of Light in the 5th tier of the tree "Increases spell power by an amount equal to 30% of your AP and your critical healing spells heal the target for 60% of the healed amount over 12 seconds". Renews built into our crit heals, that just seems crazy to me. Just gotta go 43/0/28 to get it, and on the way you can pick up another 5% spell crit from Conviction.
Another notable talent from holy, Infusion of light (2/2) Your holy shock critical hits reduces the cast time of your next holy light spell by 2.5 seconds. So instant cast Holy Light after a critical with Holy Shock. AND if you get the ret talent, you'll have a renew on the target healing them for 60% of the Holy Shock crit, or possibly Holy Light if that crits too. (I wonder if with multiple crits the new heal will overwrite the old one, or if the better heal will overwrite a lesser heal or if there will just be no overwriting, or possibly multiple ones.)
There's been a bunch of changes, these seemed to be the most noteworthy changes to me.