TL;DR - The linear clutch pedal spring I installed is working great. Everyone with a torsion spring on their clutch pedal should do this proactively.Out with the old, in with the new.
TL;DR - For the last several months my clutch pedal hasn't been returning fully. Clearly, the plastic bushings on the torsion spring are wearing out (they're squeaky too), so I'll be replacing the torsion spring with a linear spring.This little guy will solve all my problems.