So far there has been a bit of discussions and excitement about Sheath of Light vs. Beacon, and whether SoL is worth giving up Beacon for (which you will have to). But my other reaction was a bit of concern at having to give up Blessings of Kings if I want SoL. Is it worth a thought? Kings has been a fairly staple talent for raiding Holy pallies, as it has always given Holy pallies extra utility as a raid buff. Even though SoL might give some awesome healing potential, its just not as overt as Kings as a raid buff and so it may be seen as a negative by raid members, and the MT.
So is it worth it? I say yes, but I just don't know how other players will take it, and whether its actually an issue or not.