Tech Republic reported on the next release of Office (2016)

Office 2016 IT Pro and Developer Preview has a number of valuable new features  By Tony Bradley March 18, 2015

Tony discusses that many of the new features revolve around security and data loss protection (DLP). Installation and feature updates are going to be more fluid and more frequent. Activation of the product is also supposed to be simplified. There will be an Office 365 admin portal to manage device activations for your users.

Outlook should have its stability improved over unreliable networks to help improve performance. Hopefully this will help to speed up delivery of messages. Other than these under the hood changes the UI is going to remain essentially the same so that should be a good thing for your users. There are always some cries of anguish when then UI is changed substantially. I don’t think many of us like change that much.