They've done studies on schedules like that. They're pretty effective in stopping some of that summer slump, but teachers and parents are generally not in favor. It complicates things like summer camp, family vacations, etc. Personally, I'm in favor of it and would definitely vote in favor if given the opportunity. I think most people would get used to it pretty quickly.
AZ is an absolute disaster educationally. They (and quite a few other states) should be embarrassed by what's happening in their public schools.