On a technical note: I could be wrong, but as I understand it, the term "riff" generally refers to a short melodic theme, typically one that is repeated, and "modal" refers to the underlying harmonic structure. Two different realms;
I've never thought this recording lacked heart, and certainly not beauty. Posturing? Obsessing over icy riffs? Not as I hear it. Open, relaxed, and very melodic improvising? Yes.
And geez...