Not the person you asked but once gnuradio flowgraphs started to function materially outside of basic flowgraph blocks stitched together, or worse, wrapped by some python script, I would have to tap out.
It's one thing to demodulate some manchester encoded OOK/FSK signal from some ISM-band hardware monitor vs. 64-QAM or GMSK. At some point it, to me, becomes indistinguishable from magic. Fluency in DSP is, IMHO, mandatory to be broadly effective with GNU Radio.