There’s an update on scheduling here. Looks like they’re keeping End Time for now – See 4.
I have separate Work Plans for each Area and its associated Deadends. I have been testing and tweaking those. I am going to take the content of those Work Plans and merge them into larger Work Plans, which I’ll start on different days at, say, 11am and have run 'til 8pm. They won’t go the full time, but it’s a way to queue up the work you have to do.