You might be tempted to downgrade if a new update introduces bugs (e.g., ads on home screen). However, downgrading is risky:
Recommendation: Unless a specific app is broken, stay on the latest version and report bugs to Xiaomi via the Feedback app. Firmware Update on XIAOMI Mi TV 4A Pro 43
Android TV is a target for malware. Older firmware versions have known vulnerabilities. Xiaomi releases security patches that close backdoors hackers could use to access your Google account or home network. You might be tempted to downgrade if a
The most noticeable change in the firmware history of the Mi TV 4A Pro 43 has been the evolution of PatchWall, Xiaomi’s content layer that sits on top of Android TV. Recommendation: Unless a specific app is broken, stay
Early firmware versions of the 4A Pro were criticized for a "heavy" PatchWall skin that slowed down the launcher. Subsequent updates introduced the "Revamped PatchWall."