With relatively long back back and short legs, I set my position based on balance and myy feet end up where ever, within the limits. I only use 165mm cranks now though so hip angle is decent, knees rise too high and the forward pedal position doesn't feel too far forward, so yeah based on this it does matter where your legs are but if I'd go with KOPS or set my fit based on the legs especially on any longer cranks, it would just feel shit to ride and uninspiring. I tried a slightly more forward position on my bike last winter, about KOPS I suppose, after a while I ended up not really riding the bike until I changed it back, just didn't work.
With relatively long back back and short legs, I set my position based on balance and myy feet end up where ever, within the limits. I only use 165mm cranks now though so hip angle is decent, knees rise too high and the forward pedal position doesn't feel too far forward, so yeah based on this it does matter where your legs are but if I'd go with KOPS or set my fit based on the legs especially on any longer cranks, it would just feel shit to ride and uninspiring. I tried a slightly more forward position on my bike last winter, about KOPS I suppose, after a while I ended up not really riding the bike until I changed it back, just didn't work.