It's about perspective.. you are taking it from the employee POV.. I'm taking it from the customer POV. From my chair.. if Disney needs more hours - maybe they should be better staffed? If they were staffed like they had been, and couldn't get things done.. I'd have more sympathy. But as long as the attendance demand is there, Disney should be maintaining those late hours IMHO. I would support taking attractions offline for a morning/etc if there are specific things that need more effort. But most of the time I would expect such things to be scheduled anyways and could be scheduled on evenings where things aren't so back to back.
And besides.. if WDW had enough attractions, they wouldn't need to keep the same park open late each night, but could rotate.