...It's an interesting point - I love leg locks (sapateiro is portuguese for 'the cobbler'). IMO most BJJ schools should allow achilles locks at white belt, knee bars at blue, and 'twisting locks' like toe holds & heel hooks at brown belt level.
My thoughts are that the more dangerous locks should be left until the students are more experienced & therefore more relaxed. Obviously this means that black/brown belts can only try their heel hooks on other black/brown belts, but surely this is better than a manic white belt breaking knees?
Heel hooks scare the living daylights out of me
In terms of lineage, I've been lucky enough to train with Helio, Royler, Royce, Rorion (and sons), Rillion, and in Barra - Carlos jnr (and son), and a number of his world champs like Carlos Lemos and Lagarto etc. There's a definite difference in styles between the old school/practical (Helio, Rorion, Rener, Ryron, Ralek, Royce), and the latest stuff/sportive (Gracie Barra trained guys under Carlos Gracie jr.). What styles of BJJ do you guys consider best - technical/sportive, or basic/practical?