I like the DJBC and DJ Bible a lot, but it's hardly fair to call them 'state of the art' or cutting edge documents at this point. I just posted elsewhere that these are wonderful documents for absolute beginners who have NEVER cold approached before. However, there's so much more to Game than just getting over your fear of approaching. NLP, catstring theory, peacocking, etc., are barely touched upon in DJBC or in the DJ Bible.
Fastseduction and MM have their rightful place in the lore, and any aspiring DJ/PUA MUST take multiple schools and methods seriously if they are to improve. I'm no longer a sosuave adherent, but am now officially an agnostic and eclectic PUA. I am willing to experiment with all approaches. Each approach has its strengths and limitations.
Personally, I think DJBC is very useful for day game. It's a very poor resource for night game. Gunwitch likewise is great for ONS, but basically useless at night, when virtually all girls go out in groups either in single sex or mixed groups. Mystery Method and RSD (Mystery Method lite) are absolutely essential resources for night game.
Time to remove our dogmatic, rose colored sosuave glasses and look at the big picture, gentlemen.