I find the sample pages (and the whole website) very visually and spatially cluttered. (Seriously, if I felt they really knew the needs of people with EF issues, that website layout would be better.)
As a very practical issue, the weekly pages only give space for 6 classes and not much space to write in them. My kids use a full size planner and prefer ones without cluttered space on the margins ("helpful study tips!" "Write your spelling list here!", etc) because it makes to space to write smaller.
Ha ha ha, I didn't even notice, but you are right! I can't believe how bad our DNA is in this area. I'm sure there are some complementary assets...
