This is a completely valid question so thanks for asking. Let me start with saying that during the first 9 weeks of the plan the “vert” training effect comes from the weekly ME workout. That’s why the recommendation for keeping most of the mid week runs need to be on gentle terrain. Your legs are going to be tired after the ME workout. That also explains need to pile the real vert into the weekend runs. So I hope this explains a bit of our rationale.
Now, where we’ve erred is in not being more clear about the division of how much to include in which runs. I’m sorry for the confusion. We should have been more clear and even used different terms or amounts. However, I can see that you get the gist of the message we are trying (admittedly with problems) to get across. Bulk up on the vert on the weekend and dial back mid week when the ME is providing the stimulus.
I do appreciate your criticism and will look at how I might better word those instructions.