I'm not surprised it failed, with such drastic changes. Why couldn't they add a constraint of no more than 15 minutes change and reapply every year for 5-10 years until they reach a point they are happy with?
Doing small changes can help, but it is so politically complicated to change the school times that some districts prefer to do it all at once.
(Think of everything from changing heating and AC schedules to reworking start times for bus drivers to telling parents they need to drop their kids off at a different time each year. There's a reason most school administrators I know get an absolutely hunted look when you mention changing anything.)