On serious combat guns, things like trigger shoes, extended magazine releases, oversize safety's sometimes have a bad habit of causing you to say things you would never say in church.... When I was really into the various combat shooting disciplines, I used several 1911's with all the bells and whistles, and they worked as intended. When I tried carrying carrying my modified 1911's, several times I noted the oversize ambi safety would disengage when you brushed against something the wrong way, or the mag would release after the over size/extended size mag release button somehow became depressed while in the holster.
I guess what I am trying to say is that in a serious combat gun, simpler is better, and reliability is paramount.
Larry