I have a stupid question here... how do you actually use the MPS?
The sight has no shake-to-wake. And, it shuts off automatically. This sets up a situation where you draw gun, but have to press the '+' button before you can start shooting.
The only procedure that comes to mind is to use it like a legacy red dot from 10 years back: just disable the auto shut-off. Then, either keep it always on and change batteries, or turn it on when you fetch your holster with the gun and put it on, and turn it off when you put it in the safe.
My only other sight is an RMR, which is always on.