So, for the records, my eagerness overcame my patience and I updated to the latest version (which is now 2019.20.1).
I knew what I'd get (thanks to all your comments) but I finally realized that what was my main concern, the AP, is still OK, although it sometimes 'screams' in sharper turns (at least for what I could see in my 22km daily commute).
What is really scr*wed is the auto lane change. It really is scary now because it often aborts while you're crossing the line.
Furthermore, if you couple it with NoA, it makes AP totally unusable unless you are alone in the highway. When I tried to use NoA it really seemed like I was DUI.
The increased nagging is also very annoying, especially because it doesn't always detect your hands on the wheel.
All in all, I'm moderately glad I updated but I really hope that ALC gets solved soon.