If they're going to stick with Desperate Prayer as the 10 pt. ability for Holy Priests something should be done about it to make it a little more useful and fun
My idea is to allow it to heal or deal damage to any targeted raid/party member or enemy as well as heal yourself for 100% of the amount. The proposed talent Binding Heals could also work with this to create an additional heal, (maybe a glyph would be better)? This could definitely be a boost to Holy Priests in PvP as a burst damage/healing CD as well as create a more useful ability that can be used in most or all situations while leveling.
It may be a bit like Penance in that it heals/deals damage, but I think it works out nicely that Disc Priests have a single target burst ability and Holy Priests get a multi-target burst ability. CoH is the more iconic spell, but not very useful while leveling in most cases, I think this fills the niche the developers were looking for.