You are missing the point. go back and reread the original article. It messes up the metering. BTW, metering is done when you press the shutter button.
I'd much rather have a properly metered image than the red AF point if I had to make a choice.
I'm not and the shutter button isnt my AF start button. It would be easy to pause the light metering for this one short location blink of the AF point.
At any rate, that would only work for the first shot - you still wouldn't know where the AF points would move for the 2nd, 3rd, ... shot. Which is the actual issue, because the red-flare-on-focus *is* available in One Shot mode (and we all set the DOF button to toggle between One Shot and AI Servo. Right? Right?). So don't oversimplify either 
I dont care, i just dont want it to be a step backwards from the 5D II, i would be happy with the same funcionality if more cant be done. But less is just not an option.