I'll be honest, I love Faith Healing just so I can lord the healing over people. "Well if you wanted my healing, you'd better convert to the faith of Corellon Larethian" is just so funny, and is one of the best ways to be a "jerkzealous priest".
It really is a shame there's no modified forms of it, but I've met GMs that are willing to just make Faith Healing scale 1:1 with Cure Wounds, but not replace "Spontaneous Casting" with Faith Healing.