anything goes. unfortunately disney DOES sometimes expand hours in that direction. They do it and it does screw up people with PPOs because then their ADRs are in prime touring time. They do not open the restaurants up an hour earlier for ADRs though I don't think. It sucks and a lot of people get stuck. No way to know what they will do til they do it.
I do think that the parks in general are busier in october because of the combo of food and wine with
MNSSHP. The schedules are really kind of screwey this year with half of disney studios being closed and RoL not open yet but the other nighttime stuff at AK in support of that going and it's really your guess is as good as mine.