I predict apps will spam location requests to induce decision fatigue on the 'share once' users, who will switch to 'share while using' or 'share always'
According to the WWDC video [1], this can't happen. Your app has to test for permission every time you want it, and iOS decides when to show the permission dialog.
Additionally, the 'share always' option goes away. Your app has to earn it, or petition Apple directly for that permission. The 'share while using' is also now temporary, as iOS will periodically ask the user to confirm that this is what they want. iOS does this when the user is not using the app (on the home screen), which is why you must now check to see if you have permission every single time.
