I've got the number of priests in my login screen down from 4 to 2. This spell power stat thing combined with the promise of easy respecs kind of makes having more than one redundant (but I still need two).
I know people are waiting to see how the healing to spell power thing balances out, but I for one am super psyched about these anticipated changes and really hope they materialize in the final version, since I plan on staying a healer between 70 and 80.
I do think this changes the dynamic for priests a lot. Personally, I've never been that effective at maintaining two sets of gear and always felt the need to specialize. This will give me a chance to get a Shadow fix once in a while when soloing or farming. The easy variety is going to make playing this already awesome class that much more fun.
So, you know, rah and all that.