That is not difficult, and I would gather that most schools do. The KKW requirements are just enough to insure commonality between KKW schools. They expect the individual schools to add to it.We go way above and beyond the KKW test requirements
I find this to be, well, weird. I believe you; you are there to see it and I am not, but my experience has been different. Most kids are usually less precise than the adults. In terms of endurance, it depends greatly on the kid and the adult, so depending upon the mix, I could see that, though again, that has not been the norm in my experience.more mass means more power but most of the kids I see test have better snap than the adults. The kids usually perform a much more technically correct kick than the adults.
Most adults find the test more difficult then the children. I am not sure why there is this under estimation of what a child is capable of. When it comes to pure physical testing, children have more endurance than most adults. Yes an adult can lift more and punch and kick harder but that is mass and weight not physical ability.
I did not quote the rest of your post; my only comment is that it sounds like a respectable test by any measure.
Daniel