Revamped "Alarms" app with addition of "Stop Watch" and "Timer" and elegant user interface like the one in Windows 8.1 version of Alarms app

More "Quick actions" in Action center accessible by swiping to the left/right. Example

3

Option to clear app cache. For example the Onedrive app takes up 200+ MB. Most of these are cached data and there's no way to release this space.