Let's hope there's no flying on August, then. I really don't see why we'd have to have flying; we have the flight master-whistle, right? While I think it's inane on its own, getting flying back on top of it? No thanks.
The few months I came back to wow (after taking a break just as 5.0 prepatch hit to July 2016), no flying was the main draw.
World pvp in Legion is enjoyable again. Flying will remove that, likely.