Very true. It's hard enough being able to use the fundamentals in sparring never mind anything else. As soon as you start adding things that don't belong the whole system is fooked. These things only appeal to people with funny ideas and aspirations.
Adding chi gung, dim mak, different kinds of power, thinking that one can win a fight by sensing energy in another's arms is really what damages the system. Also adding 100's of different fighting applications is completely wrong. Less is better. Simple thinking, intelligent fighting.
Agreed but prior to that how many people fail to explain the correct reasons for the pushing and pulling of Tan, Fuk, Wu in SLT? The problem quickly starts from the first lesson or even before when Wing Chun is marketed as if this arm sensing game has some sort of benefit in actual combat.