Healing rotations are situational to the extreme. Every fight needs a different kind of rotation. This requires a lot of direction and learning for leaders and healers. Since there's a learning curve, we'll have to introduce it gradually so it doesn't interfere with the raiding.
While the rotation you outlined may be nearly optimal for that one situation, I consider it to be too complicated.
A simple plan would be: split the healers into two groups, when one is nearly out of mana, switch. This would be an improvement in many parts of Molten Core, so that our healers aren't overhealing nor are they running out of mana. I am not saying we should do it that way, just that we should keep it simple.
If the plan requires someone to be trained to recognize abilities for a group of 10 healers and call out who should be healing at any time, then the raid would become dependent on the leader. We need a plan simple enough that anyone can do it. For example, we could do away with the leader completely and have the groups switch whenever any healer is about to run out of mana -- they could just call out on TS or in chat that the other group should take over.
Having someone yelling every 2 minutes to switch would be an amusing cadence for our raids. A bit like the "Change Places!" call in the tea party scene from Alice in Wonderland or "Spaaawwn..."
Often times healers will be disabled in a fight, and in my experience a complex rotation never recovers from this. Someone is always left wondering if they should be healing or not. Redundancy is important, so that the healing rotation itself doesn't become a problem when healers die.
--Lefou