It's not about being different, it's a matter of having the courage to fight for a superior idea.
In the case of the OneDrive app you mentioned, it's a usability nightmare. The hamburger menu displays a screen which simply hides functions (Progress and Settings) which could happily sit in the ordinary menu under the ellipsis.
The bigger problem is that the UI is left in disarray... the user has to look in three places to find functions: the hamburger menu in the top left, the search button in the top right, and the rest at the bottom.
If the app followed the Modern UI guidelines, all of those would be at the bottom, leaving the user with no uncertainty.
At least in the Windows 10 screenshots, they have cleared up this confusion by only using the hamburger menu.
But the annoying thing is that they've forgotten what was good about the current WP design principles:
1. Functions at the bottom, near your fingers, where the screen can't be covered
2. Iconography with easily accessible captions (non-IT people hate guessing what a button will do)
3. An elegant solution for showing some functions and hiding others (hamburger menus hide or show everything at once)
8 ways to tell if your mobile app sucks | Pocketnow
https://windowsphone.uservoice.com/...ons/6993439-buttons-to-down-not-use-hamburger
Vote if you don't like the regression of the Modern UI!