Based on China Stable / Weekly builds (except HMNote3SE, POCOF1)
Enabled search gesture (swipe up) on the desktop
3way reboot menu
Removed ads in system apps
Face Unlock for all 7.x/8.x/9.x devices
Vertical clock widget on lockscreen
Steps counter in Assistant screen
More shortcuts on left lockscreen
Wake up gestures for 7.x/8.x/9.x devices
AI preloading option in MIUI Lab
Fullscreen gestures for 8.x/9.x devices
Option to auto-expand first notification
Notifications priority settings
More edit options in Gallery app
Enabled MiDrive in File Explorer
Added landscape mode for SMS app
Sunrise/Sunset in the weather app
Google apps support integrated
Importing theme from zhuti.xiaomi.com via ThemeManager
No useless Chinese bloatware apps
More free RAM due to less background processes
Unified flat style app icons for both system and 3rd party apps (eg. Play Store icon flat too, unlike official global MIUI)
Advanced menu with color icons (not just text like in official MIUI releases)
No any Chinese character under the full system
Mi Video, Mi Music, Mi Browser: No any useless Chinese content
No possibility to re-lock bootloader accidentally with flash any xiaomi.eu release
Added real 27 languages translation made by Official MIUI Fansites and MIUI Fans
Added EU T9 dialer support
Added charging sound switch
Added Spell Checker switch
Added Screen-OFF animation
Added AI Preload for 8.x/9.x devices
Optimized GPS settings for EU
Optimized Battery consumption
Optimized RAM consumption
Added 4k Video support for MI4C, MI4S, HMNote3Pro, HMNote3SE, HMNote4X
Added 3D Touch to MI5S 3GB RAM version
Added GSMalphabet into SMS app
Added more icons grid layout 4x5, 4x6, 4x7, 5x5, 5x6, 5x7 (depends on device)
SafetyNet passed (Google Pay)
Play Store Certified
Deodexed
Added automated tasks
Added game speed booster
Added erase module (magic elimination) to Gallery photo edit options
Fixed low volume sound via headphone
Fixed Google assistant voice response issue
And more, and more made by our 5 years MIUI mods experience.