I expected to see something a little more "comprehensive" than reducing combat to a square wave analysis for made up burst numbers, though the goal of this analysis seems to be more about explaining the new timing windows in fights and how that's changed.

Would be a bit more comprehensive to see an analysis with actual potency numbers and calculations.

Could someone explain this a bit more?

DPS checks now have to be tuned low enough to account for mistakes rather than being tuned for average play with room to do even better.
What distinguishes average play from making mistakes in rotations? I would think average play is equivalent to making mistakes.