Trigger shoes increase the width, hence the reduce the sensed trigger pressure. They are useful only for single action shooting, and make it much harder to roll and slide the finger for double action. They also have a tendency to shoot loose, and if they are wider than the trigger guard, present a safety hazard when holstering.
A pinched finger most likely occurs when the fleshy part of the finger gets caught between the trigger and trigger guard on recoil. A shoe won't help this. Hold the trigger higher in the curve, and grip higher on the handle. Holding the trigger long reduces the force needed for DA, but increases the chance of pinching. (I had that problem with my Springfield XDs, until I readjusted my grip and my thinking about that "safety" tab.)
The best way to reduce the sensed DA trigger pull is to put the first knuckle on the trigger rather than the fleshy pad. It may result in a less than ideal hand position, but it won't pinch and it's easier to shoot.