Yeh, I know the Zobel shouldn't make a difference... it just shows a building block copy design in a speakerless project.
However, it is a capacitive load in addition to whatever you hang on the output. Those effects are mitigated here by the tone control resistors.
Nothing much was said about the relay bypass which probably isn't going to be used. If it was, the SPDT contacts by the relay are the latching footswitch which only needs to be SPST and the bypass DPDT are the relay contacts. Note the FX output muted by the transistor in bypass.
