Expert?????
Hardly. I've spent most of my life trying to be an expert yogi and it keeps getting farther away. Now I just practice and let the people I named in my original post be the experts.
I don't like blends. I think yoga is yoga and MA are MA. However, I DEFINITELY think that the two compliment each other. (Or is that "complement"; I've never taken the time to learn the difference.) My Xingyi practice has been vastly improved by yoga and XY has given me some body insights that apply to yoga. I think you get into trouble when you try to blend two traditions into one. It's sort of like making a casserole out of sardines and sombreros. For some reason, it just doesn't work.
It's probably the sardines.