If you take the time to look at most arts that have been around for somtime .you will find that most have way to much incorporated into them to make most the training useful. A art that builds less on the different levels of unarmed combat is most often going to be more effective for more people. Use the concept of stand up, clinch and ground. which fits todays understanding of fighting. Why build a mountion of stand up tools that you would most likely never get off in most fights. Same in the other 2 areas, Round off the most common needed tools and you have a much more complete art. Complete means being able to deal with the diffferent aspects of the fighting ranges Bruce used the concept of kicking ,punching trapping and grappleing ranges. Now its better said as standup. Which includes punching, kicking traps, . Clinch which includes joint locks or manipulations. elbows head buts standing chokes knees. Ground which includes joint locks manipulations chokes head butts elbows ground and pound. Left out is eye pokes, bites, ect. Cover these 3 ranges and several arts have these tools that one does not have to look out side of there art. They just need to spend more cover time training the key tools. I just really think there has over time been to much put in different styles that they loose effectiveness from trying to train to much un needed selfdefence tools. A good way to see this is watch people spar watch some ring fights even some street fights. A small amount of structured tools are used far more often then alot of what most schools teach. So why teach such a large amount of nonuseful methods. Matter of fact a person could give the most common tools of training to any New person in say 6 months and then give them the training time for another 18 months To over all improve. And then that person has the rest of there life to just keep getting better. No 5 years of learning new tools after tools Then more years learning a few more then 20 years trying to understand them. And the aspects of M/A training still holds its value that is building a better person