The reality within the special units around the globe is that after they receive the standard combatives training program their training continues with seminars that are teaching the personnel techniques, methods developed by different people that practice different styles.What do you think about Wing Shung? Bundeswehr Special Forces are trained by a turkish Teacher.
We should understand that hand to hand combat training can differ from traditional martial arts training because of the needs. A soldier or a policeman should know how to establish control over the opponent, should know how he can assure his safety after control is being established by knowing in which situation the hands must be behind the head or on his sides for example or to know if the palms should face down or up, he should know ways of disturbance the explosive power of the target after establishment of control, when to command the target to get on his knees and when to lie on his belly, he should know how to restrain, cuff, search and transport the target in the right way ensuring his own safety and also the safety of the target. Usually these are things that are not being practiced in traditional martial arts schools. Almost every style could teach you to punch somebody in the face but not much styles could teach you how to properly restrain, search and transport a target.
Wing Chun is not a bad style but it lacks ranged techniques and grappling. A Wing Chung practitioner should practice often with practitioners of other styles because by training Wing Chung solely a lot of patterns and drills are being worked that usually are not seen in other styles. This however can lead to confusion. I think this is the reason why Wing Chung practitioners have problems facing more widely adopted styles like boxing or kickboxing for example. The same goes for Filipino styles. It just brings a confusion as they face something new and in this situation it is difficult to adapt to the new range etc. As a guy who have practiced with a guy that loves Wing Chun I can see both de benefits and deficiencies. I personally prefer more powerful and straightforward styles. Developing the right power for Wing Chun can bring good results in close range but needs a lot of work especially in the technical aspect. I am on the opinion that the base course should be consisted of basic kickboxing striking combinations, defence work (especially learning how to keep your hands up), basic takedowns, ground control positions, the most effective chokes and couple of the most effective locks applied to hands and feet. In the next stages I have nothing against practicing Wing Chung and getting the positives out of it because there are a lot of positives for sure but the base should be something that prepares you for the most widely seen situations and ways of fighting around.