Nick,
You have done something many people these days are not willing to do. You have gone out of your comfort zone and taken on something new. Personally I believe that fighting is fighting no matter how many arts you study. Just like any other art, the more genres you study the better you will get. I can?t tell you how much studying Jazz has helped me in playing Rock music. While I am not an artist I have heard the same thing about drawing and painting. That said, I don?t think taking on the addition of MT & the FMA?s at once is too much. In fact, when I started as a kid JKD, MT, FMA, Boxing & Grappling were all thrown at me at once. ?Research your own experience, absorb what is useful, discard what is useless and add what is specifically your own.? Take it all in and gather things that work for you.
In that respect stick work has helped by giving me the positive externality of an insanely strong grip. This has drastically helped out my grappling. The FMA?s in general have helped out my footwork for Boxing and MT too. JKD trapping (while many people think it does not work) has given me the upper hand in grappling, boxing and MT as well.
Keep us updated on your experience,
Gruhn