According to a sent email to AndroidPolice.com Huawei is expecting to release the update to Android 7 Nougat for the Huawei Honor 6X upcoming March. With this update also the latest version of EMUI (version 5) will be shipped too. This is sooner than expected.
In the email that AndroidPolice received, Huawei said:
The new EMUI for Honor 6X will be arriving next month, and it’s been updated based on consumer feedback. In case you or your team is planning a full review any time soon, it might be worthwhile to wait!
When Huawei is starting the roll out, we can hopefully give you more information.