I haven't made my way through that entire thread yet, but this whole issue fascinates and frightens me. It seems there's been a fairly radical change in approach to the way Disney views the "slow times."
When I visited the Magic Kingdom on a Friday in late October of 2015, I was in the park from 9:10am t0 5:30pm, and I was able to do 19 attractions. Something tells me that will be virtually impossible during my next trip later this fall.