I receive tons of notifications on daily basis. Slack, Gmail, Mail, Calendars, etc. In iOS 9, the notifications is grouped and I can reorder it manually: 1. Clear just, say, Slack notifications only but leave the text ones alone. 2. Reorder calls notifications to always be on the top. Now I have to scroll down and eyeball which notifications are from which app and I have to clear specific notification one by one.