The only people I've ever encountered who have problems with DA/SA transitions are people who lack an understanding of the fundamentals of trigger control, frankly.
Take a DA/SA pistol to an IPSC match, or even out to a hayfield and time your splits. And that's only playing around. In a real stress situation, you don't have fine trigger control. I've seen guys shoot beretta 92's well, but I sure wouldn't sneer at the benefits of a consistent trigger pull in a combat handgun. Why introduce complexity?