From the prelude to the current predicament: I have, on one hand, a powerful device with notable capabilities, but, on the other hand, appears to be plagued by Chinese dictatorship and possible unwarranted data gathering…
Putting aside personal political views and paranoia, does the Mi 5 Pro, in full unadulterated “China Stable ROM” glory, work?
2016/06/05 Update: The Global Stable version 7.3.5.0 of the ROM was launched, although it should be noted that if your device is on the China Stable ROM, then you will still need to unlock your boot loader, literally reformat the /data partition (i.e. losing all your information because the stupid China Stable 7.3.4.0 ROM does not give you the option to decrypt the partition) before installing the Global ROM. Depending on what time and inclination I have, I may try to install it and review this Global version (maybe in comparison to China Stable and EU ROM).
2016/07/31 Update: Other numerous Global ROM updates have since been released (the latest being “Global Stable 7.5.2.0“), and although my experience grows with multiple handsets being used as “daily drivers” (one with ROM version “Global Stable 7.3.10.0”, the other “Global Stable 7.5.1.0”), the below points have been updated and all other points are still relevant up to “Global Stable 7.5.1.0”.