A standard Athearn SW1500 stalls on some switches when both wheels of one truck are on the dead frog (the wheel distance of the SW1500 truck is less than the #6 frog length) and the elevated frog raises the other two wheels of the same side over the rail.
A standard situation with the well known Atlas frog alignment failure and the stiff mounting of some Athearn trucks that can not be handled with a dead frog.
Brian replied: But shouldn’t the pick up from the other truck of rhe switcher take are of electrical pickup when one truck is on the dead frog?
Brian replied: Isn’t this separate issue having to do with the frog,…powered or unpowered?
Brian replied: If the Atlas turnout and its frog were mechanical correct, shouldn’t the loco pass over the dead frog?
Brian, that is right.
A frog mounted a tad to high -and- a truck mounted quite stiff -and- a frog that is as long as the truck -and- a dead frog
is asking for to much luck 
The KISS way I am going is fine under certain circumstances but you just add one more risk to your layout.