Dang, It's nice to see all the input. I'm on a mission to liven up this FMA sub-forum. Unfortunately I'm not much for posting videos... that's Brian's specialty I think (thanks), but whatever I can write, and whoever I can contact to get more people posting here... I'll do it! Help me out, y'all.
Now back on topic. The FMA I'm training right now is Martin Torres' "DTE" Eskrima, although my roots in Latosa PMAS Escrima always show. My "core" art is NVTO Wing Chun and I find that Eskrima has really helped me. But other members of My group are boxers, MMA guys, Kenpoists ans so on. And, as I said above, they also feel that Eskrima has helped them. And yet as a 'Chunner, I don't move like any of these guys.
So it's really not about technique at all. Not even footwork (although I have learned some useful stuff there). It's all about core concepts. In Latosa Escrima, I was taught about integrating Power, Speed (distance and timeing) Focus, Transition and Balance... and Attitude or "mind-set" into whatever I did. DTE emphasises getting "an angle", "diamondpoint" (pinpoint redirection of energy) and "pressing forward" with your attack (even when you are apparently retreating). Both systems also strongly stress simplicity, directness, and practicality. All of this harmonizes very well with Wing Chun. It also harmonizes with just about every other combat-effective martial art I know of.