It's not our aim that the information at Facebook should be mandatory. In this case, we actually thought the issue was fixed.
Your question has actually made us realize that it still exists, and we have also already figured out a potential case which we will fix. If this is the final bug related to this the lab caches should be solved for all our active site users within 48 hours.
Your chosen words regarding news on Facebook is quite good actually. I like the word lightweight. That's pretty much how we intend to see it as well. We post things that might not matter 1-2 weeks from now. Either because it will make it into the next newsletter, or just be because it's not a permanent information post, like the above (if the issue actually was fixed as we thought). Typical posts are also things like "We are currently having maintenance, the site will be back in 1h", "Our ISP currently has routing issues, if you can't reach us you are probably affected, this should be resolved fairly soon".
The last weeks we have had two surveys out there, while they potentially could be of interest, it's not really a mandatory thing.