[madhadron]

I assume you are drawing your opinions from practitioners in random dojos in strip malls and from the Internet. But the same can be said about most karate and tai chi studios. Yet no one disputes that there are karate and tai chi practitioners who are very proficient fighters.

System matters less than practitioner. When people ask me who to study with in my area, I send them to a goju ryu practitioner I know. Does it matter than my core mechanics come from pa kua zhang? Not in the slightest. He's an amazing practitioner and teacher.

If you have rolled with Didier Verna or have examples of problems in stuff he has written or otherwise posted about martial its, then point those out. Discussion of systems is never helpful.