I don't consider myself an expert or heavily experienced with Priest healing, but I've done a lot of research the past couple months coupled with the raiding I've done and very experienced Priests I converse with regularly in-game.
I haven't played Disc in several months, and probably couldn't go back to it now for raid healing. For me, Holy is the only option. Looking at your spec, gear and gemming, it seems like it should do just well, with maybe the switch of points from Emp. Healing and 1/2 SoL to Blessed Resilience the only change I would really suggest personally.
To me Holy feels like it should be more of a jack-of-all-trades. With our talents and abilities we're able to cover every area/type of healing adequately. We can certainly top the meters on many fights and can usually even shine as tank healers if done correctly with spec, all while rarely having mana issues. That's also usually the position I find myself in for my raids. I typically run with at least 1 shaman, 1 druid, 1 (sometimes 2) paladin(s), and at least 1 other priest healing. I find myself helping out tank healing sometimes but mostly raid healing, and I have no problems keeping pace with the Druid, pulling 3.5k-4.5k HPS on most fights in ICC, higher on some.
I have not yet experimented with B&S, but have toyed around with making a few specs on WoWHead that include it along with other talents that I personally deem "necessary", and will be trying them in time. It just seems too situational to really be useful in my standard healing build, especially for 2 points.
Feel free to check out my current spec/gear/glyphs/gems/etc (see signature). Any and all critique welcome as long as it's constructive.
My "goal" is:
WoWHead Profile
Quick explanation of the "goal" stats/gems: The haste level is something I'm comfortable with there, 23% is fairly nice haste, 3600+ sp unbuffed = very nice, I gemmed sp+crit because my crit was too low for my liking, still is slightly low, I generally prefer 20% unbuffed (sans talents), but 19.6% is close enough. Though I could easily swap out the cloak or ring for the crit equivalent without losing much haste at all.
Thoughts? Ideas? Specific topics to discuss about the specs? I don't feel like I've really talked about much, but you post didn't seem to ask a clear question or pose a specific point of discussion.