I mean the principles are the same but i think the vertical integration graph is reconstructed from the CFTS which was written 10 years before the S-L Van graphics so they do not necessarily relate to the same programme. Just because it shows something happening in week 10 on the vertical integration does not mean it relates to what is happening on week 10 of the Van graphics. However as the intensity of the runs in the Van graphics goes up you can infer that the volume of jumps must be going down and you probably aren’t doing max strength etc…
You could try cutting volumes but keeping ratios and see how it goes but ultimatly you have to fit it to your situation. If you need to do more speed work or tempo etc then the ratios would change. The thing about these graphs is that they help to illustrate principles NOT provide a programme to follow. That’s why Charlie never put out SPP2 because people just kept copying the SPP1 and saying “it doesn’t work”. Of course it doesn’t work in a lot of cases because it’s written for a fictitious athlete to illustrate key principles. However, the underpinning principles do work once you identify what you need to do to improve. It’s like supplementation. You feel tired all the time so you take creatine but it doesn’t help. So you come to the conclusion that creatine doesn’t work but in reality you are anaemic and in fact what you really needed was iron!