I have a subscription, however, I e-mailed them because the numbers seemed way off. They responded and basically said, "we agree, they're wrong, we need to update them." But they haven't updated yet, so they're pointless.
Personally, I'm expecting Sunday to be the busiest, with the walk plus first weekend day since the new Fantasmic that the lowest tier passholders are unblocked.
Also note that Saturday the 26th and Sunday the 27th are your only 2 options for Fireworks and Fantasmic, they are not showing the 28th through 31st. However, attendance will likely be lighter those weekdays because of that, at least during the hours passholders are at work/school.