Hi, lol, I was too lazy to read the last half of your post, but I just wanted to reply to your question about Efren. I do not think he needed any systems, or any of that other mumbo jumbo (whatever), lol. He learned everything, and mastered everything about all of the games, by just playing, probably 18 hours a day, for who knows how many years. I do not know if he ever did drills, for example, but I would not be surprised if he never did a single drill in his entire life. I would not be surprised if he gained all of his knowledge, and skill sets (in the various games) simply by competing against the best players he could find to compete against.
Keith McCready said that he never did drills, and I read that he was the most feared money player on the planet, back in the early 80's. Look how great he played, with that very unusual style. I believe that he got to be one of the best by simply just competing.
I believe that maybe many of the greatest may have never had any systems, and never did any drills. That would not surprise me a bit. They simply just knew the ins and outs of everything, and had a very high level of natural ability.
Or, maybe I am completely wrong about everything that I said above. I do not know. I just remember reading that bit, about Keith McCready saying that doing drills was a waste of time, in so many words, lol.