I guess it is a matter of personel choice. I was taught the Weaver stance and have a finger around the front of the trigger guard. My 1911's have square checkered trigger guards and the front of my Mdl-19 Smith is checkered. For me, I have been doing it that way for well over thirty years and my muscle memory is not gonna change! Kinda along the line "if it ain't broke ya' can't fix it".
Big frame revolvers like Pythons and N frame Smiths I wrap both hands around the grip and don't put the finger on the trigger guard.
As for doing this to a small pocket auto, probably not needed, IMHO only!