Another words, the more and more you go above 200 degrees, the more and more timing gets pulled.
This is a "multiplier", so its not like a 1 to 1 ratio obviously. Not like you have 50 degrees of timing to lose at 250 degrees F.
If you were at the track, and just doing 1/4 mile sprints, you could get rid of this and it would lend a bit more timing, but not much at all unless your seeing 225 degrees type coolant temps, and in that case, you prob want power and cylinder pressures reduced.
Me personally, I've never edited these, and prob never will. My climate is so hot, i need all the compensations I can get for when stuff gets hot.
I did move up the charge air temp timing reduction JUST A BIT while at the 1/4mile track, but otherwise, I assume ford did things like this for a reason.