Eloquently stated, Velox. I thought for sure that I had conveyed this idea in previous posts but am glad your post focused entirely on the concept of reactivity.

It's easy to label WHM as inferior compared to SCH when you have a static group of people, know each others' playstyles, and everyone dodges 95% of the time.

When you start PUGing content, though, then it's time to bust out the WHM.