Technique is a means to an end, not an end in itself..
Most of the 'rules' seem to come from classical saxophone methods and I don't listen to or play classical saxophone, so why be restricted by their methods? Would you go to a classical guitar teacher to learn to play the blues?
I'll take on board advice from anywhere, but if it doesn't work for me then I'll find another way
Personally I've never worried about any of this stuff about biting or how tight or loose my embouchure is, life's too short., I do what's necessary to get what I want out of the instrument - exactly how much pressure I apply with my lip and exactly where on the reed I apply it is crucial for altissimo and multiphonics.
All parameters are variable and open to experimentation in the cause of self expression, why limit yourself?
For me the embouchure is in a constant state of flux, shaping each note the way I want it. - classical players seem to want every note to sound the same, I want every note to have it's own individual personality, I'm a human being, not a sequencer.
One of my friends studied with Eugene Rousseau and asked him which techniques were considered legitimate. The reply was that "any technique is legitimate if it achieves the desired results" - the latter part of that sentence being crucial in that you have to understand clearly what results you desire.
I am of course a dangerous libertine with no regard for authority, so feel free to ignore any of the above