Saints give enough power that you can one finger brake all the time without even needing to pull hard. It's amazing how much difference only having to apply gentle 1 finger pressure for even the most aggressive braking makes as regards to finger and hand fatigue and so how well you can brake or even hold onto the bars by the end of a day of heavy braking.
Agree new Saints are overkill for trail centres or rides with easier descents but for rides with lots of steep descents, Alpine trips and DH riding they are perfect.
What they also allow you to do is run smaller rotors for the same amount of power reducing the likelihood of a rock or root strike bending the rotor.