The second diagram under 1.5.3 and the diagram under 1.5.3.1 are not very helpful in articulating how to deliver the PGx results. If it is helpful to see how the profiles build on each other in a more general way, perhaps these diagrams should be made a little more generic and part of a higher level page?

Also, the textual representations of the examples are not needed. A reader can refer directly to the examples. The more times we do things like this, the more likely things are to get out of sync with each other.