Your picture jives with how I thought it would work.
I’ve been watching this thread for a while and it certainly took a surprising twist from MBD-1 to a blend!! Funny timing too, I just started looking into blends... and this one brings up all sorts of questions! Is the wet signal unfiltered and only the clean has the LPF applied? I didn’t notice a difference in the video but does that mean if the pedal is engaged and set at full dry, the output signal would actually be the LPF’d version of dry? Finally, I can see how the LPF would really be beneficial with a lot of wet mixed in... how does it work on the drier side of things?