singular cognitive functions don't accomplish too much though so whats the point? you need to look at functions in relation to the other functions (orientation) to see the true significance of function theory. the two problems i have with this system are as follows 1) its not easy to learn (not too hard though) and the actual real world application is slim, the profiles are as good as they can get imo without being stereotypical, and, personally, thats good enough for me, and 2) it ignores function orientation which is an extremely important part of function theory, really the whole part. an individual function doesn't tell you much but 4 functions in their predefined order tells you tons.
i am stil interested in the idea, and i did read through it a bit more, so if you wanna sell me the idea then go for it.