Something to consider working SHO and WHO is to shoot some drills intentionally varying the speed of the DA press. I like to raise the gun up from a low ready and press, working towards breaking the DA shot as the sights align. Shoot 5 at one speed, one DA press at a time. Then increase the speed of both snapping the gun up and the trigger press.
It's common for new TDA shooters to slow down the speed of their press when shooting with a single hand. I've caught myself doing the same. When I start slowing the press down, I reach a point where I tend to anticipate more. I "think" its because I start inserting my conscious brain in the process to shift gears to a slower press. Thinking about the trigger press is almost always a bad idea.
This drill works well with two hands also. Its a pretty way to find just how fast you can manipulate the DA trigger and still get acceptable hits.