I’m familiar with your observations but I don’t have them because I only carry S&W revolvers. Have you considered wearing a thin leather glove on your left hand?
I have worn gloves, because I practice at the range with both. But I also HAVE to practice bare handed, and prepare for operation with a bare hand because .. well.. it’s a pistol.
I’m going to make a video later on and post it up on the blog section or something. Maybe post it inline here.
I have a technique that I have developed and shared with people over the years to address this. As a pianist and computer-based professional my hands aren’t quite a lumberjack’s hands.
What I’ve discovered are ways to keep the fleshy bits of your fingers from rolling over the boney bits of your fingers. It’s lead to far less pain and more far more control of a semi automatic pistol.
I utilize a finger positioning that can (can, not will) double the amount of surface area your thumb and index touch as well as a wrist action that will enable even the least muscle-bound to actuate the slide. It also helps control the ejection operation and can allow a novice to remove a single round from the chamber and into your hand.
At the range I perfected this method to purposefully stovepipe pistols for RSO inspection.