My question would be - Why would anyone want to drag a light aircraft down a 3 degree glideslope when a steeper approach may be far more appropriate. My base airport has PAPI on two runway ends. I am always well above it on approach and, if I need a short landing, descend though it before touchdown. My approaches are always far steeper than a PAPI glideslope unless I'm flying an ILS or LPV approach.
Fly the aircraft you are in, not the airliner you aspire to fly one day. Touchdown point should be pilot selected based on more factors than where the PAPI would take you.