Whether it's going to hurt you depends on how well you can handle the healing now and how exactly you spec. Looking at your talents you're only missing Spell Warding, Blessed Resilience, Martyrdom and Improved Mana Burn from the "must have" talents. Shifting a few points you could easily get something like
http://www.wowhead.com/?talent=bxMrzhMZfVxccMsVuA which shouldn't affect your raid healing too much. It gets a little trickier to keep the raid talents if you shoot for Focused Power though.
http://www.wowhead.com/?talent=dxMRuhgzMZfVxccMRV0h is an example that's closeish to what you have now, and as you can see you have to drop the deep holy talents to get it.