I think it was more of an aesthetic choice because they were going for a "could have been made in the 60s" vibe. They chose some knobs that Orange Amplifiers used and that work fine on an amp face but that no one seems to like in a pedal format.I can't wait to get new knobs, the stock ones are a pain...
Whomever designed this, was not really concerned with usability or was trying hard to get some more margin...