It seems that there is something coming. I saw Updates (not all available yet) in the Software Updater what seems to adress that:
When You click on each and then look at the Changelog, You see these:
When You click on the blue Link, You get a Launchpad Website where at the Top is a List of Packages but when You scoll down, You get the Description where the Situation with the Certificates is mentioned. And because of that these Updates are made.