Sort by file type
There should be an option to sort by file type so you can order things more quickly if you are looking for say a word document that you have deleted by accident.
This is now done for OneDrive for Business (see Dan Gork’s reply below, thank you Dan!) and in consideration for OneDrive for consumers.
Luqman Yumi commented
This is a must. They already have it in Explorer, why not implement the same thing on OneDrive. Even Google drive doesn't have this functionality. Bummer.