I do agree that the Easton guide is only a reference and there are many variables to any setup but to say you can't have a spine that is too stiff is completely untrue.
You see indoor shooters shooting way overspined arrows all the time BUT they put extremely heavy points in their arrows to bring the dynamic spine down to a manigable point.They also are shooting indoor with no outdoor variables,along with not trying to penetrate an animal.Oh yeah,they are only shooting 20 yards(along with near perfect form),when those same shooters go shooting at Atlanta,you can bet their setups are much closer to correct,where spine is concerned.
I also completely agree with your first paragraph Len.But at some point,too much is too much.