I have learned a lot thanks to this documentation and FH post. And I am a trader profitable in the last 2 years. So first of all thank you. I totally agree with you that a relavant issue are the lack of basic (well not basic, advanced) c programming skills. I take 5 lines of code tio perform the same task you do in one line... On the other way this is the purpose of manuals and tutorials (great the ideas of Alice and Bob): learn and improve.
An example of a a function that I use, based on your documentation and articles, but i do not why ? DETREND I have asked examples on how it works, but I did not receive answer... Maybe in the future
I can list many other: the new TRAIN methodology, several matrix functions (a tutorial will be really welcomed)...