Audio Track Mixer pan knob disproportionate size

The pan knobs in the Audio Track Mixer seem unnecessarily large, as their size doesn't impact functionality or usability. In comparison, the pan knobs in the Audio Clip Mixer are half the diameter yet provide the same adjustability. If the Audio Track Mixer pan knobs were the same size as those in the Audio Clip Mixer, they would appear more proportional to the level sliders (like a real mixer) and would free up space for longer sliders.