As I bought a FlyRig v2 recently on here, I had a quick look at the manual for both the FRv2 & BDDI.
There isn't a blend control on the panel, and it doesn't look like there's any facility for it in the manual.
Don't forget that you also have the 2 channels of BDDI/VTDI, Compressor & OctaFilter, which can do the AutoWah thing, as well as sub-octave & fuzz. Versatile piece of gear.
I couldn't belive how small it was either!