While written specifically for the new honor 5X,
this article from +Phandroid
has a collection of great tips for getting the most out of Huawei's custom EMUI 3.1 software. Some of the features are really quite helpful - once you know how to use them.
One note: On the topic of Protected Apps, Phandroid recommends "protecting apps like launchers, music players, [and] messaging apps"; after using several Huawei devices (including the 5X) over the past year, I strongly advise protecting ALL apps except
for any known to cause problems in the background (Facebook, Instagram, etc.). I've been running my Huawei devices like that since October or so and it's made a big improvement in everyday usability.