i had some fun recently by rooting my P10000 pro and making a custom interface for the device.
Check this video to see what it looks like : https://youtu.be/3lAc8Go6iAo
i took the stock interface apk and cutomized it with my own logo and added a bit of code to unlock brightness slider, cutomize navigation bar, ..
If someone is interested in doing the same, you have to ROOT your phone before, and then you can ever use apkeditor to customize your own user interface application or just replace it with my own apk.
link to my own user interface apk will be provided if anyone is interested.