There's a common issue with the idea that every good system would show up in MMA. MMA requires a certain mindset (a competitive one), that isn't what attracts everyone to MA. Some styles simply don't attract the kinds of folks who are well suited to MMA.Not here anyway, although someone must have said it somewhere.
The reason I say that is because I just watched a video of an MMA fight where a Wing Chun guy got grounded and pounded bloody in less than a minute...because he basically just stood there while his opponent rushed him.
I wish we could get some decent representation in MMA. I mean, personally I know the system is worth studying, but damn it would be nice to have at least ONE champion! lol