You've heard me talk about Cataclysm's revolutionary triage paradigm of healing, and you've read all about the new Three Heal style for heal design. Every healing class starts with three nearly-identical healing spells as a baseline. The devs then sprinkle in a few extra heals to make each class somewhat unique. Add in a variety of AoE and specialty heals, and you've got a recipe for any one of the healing classes in Cataclysm. We were subject to a lot of retooling to get our holy tree to fit into this model, but it was definitely a success.
While it's fun to discuss the paradigm from a bird's-eye view, it's also not representative of actually healing encounters. WoW isn't played with a pen and paper, but with a keyboard and mouse. Every boss encounter requires different techniques, and their varying mechanics are key in determining the best course of action. How can we take what we know about the new healing paradigm and actually apply it to real encounters? What heals are holy paladins really using today?