It really depends on the purpose of the kit, teaching university students, It should be a support product not a full teaching aid. Lectures provide a substantial amount of information that is more specialised for degree obtainment. Otherwise do you learn or just follow.
If it designed for the hobbyist then the manual actually looks complex unless it could be used for aspiring hobbyist to consider getting a degree.
So my feeling is there is a balance between degree and hobby introduction to theory, too complex and it may push away hobbyist away from the industry.
Personally it satisfies both areas reasonably well. It maybe too simple for people like myself but I would then use it past my current capabilities, ie: for quick hookup of a design.
Please do have a look through my review : Analog System Lab Kit (STEM Product) - Review
Nowhere have I mentioned that the kit underperformed. But as a university student, I found the manual to be ill-equipped in the practical approach you mentioned. Most of the manual consists of a re-iteration of the formulas mentioned in the lecture links given in the manual. In fact, few of the formulas given in the manual have not been explained clearly. This is why the manual did cause me some difficulty.
you are right, but I agree with nixiefairy that this manual should do better. For instance the external links in chapter 8 about AGC's points to completely different implementations than used in this chapter. At least a reference should be given to a description of the method used in the experiment.