I don't know what you mean by "disc" pretty much all healing priests are specced into both the disc and holy tree, the disc tree is kind of a support tree for holy, and you don't really go down all the way in either tree.
This is a pretty standard priest spec, as you can see the only difference would be if you specced further down into Power Infusion.
I guess that right now in MC you don't really need a lot of healing and could get away with having power infusion to boost the DPS of some caster - but then you would lose out of spiritual guidance and spiritual healing in the holy tree which are both really powerful talents.
The raid lock-outs are as they were.