I've had a cleric in Exalted Angel through most of the time Epic Destinies came out and I've noticed that Renewal is not ticking for heals as fast or as frequently as it did before. Even the description says ticks every 2 seconds for 8 seconds, now it only ticks twice and it's usually 4 seconds after it's been cast. This is probably since around October but I'm unsure. As really the only healing power worth twisting from the Divine Sphere, Light the Dark needs two twists and one of it a tier 4 to work.