You might already have seen it: When you go to https://quality.embarcadero.com/ there is a notice at the top saying:
So be prepared (presumably already today) for not being able to file new reports or edit/comment on existing ones. Searching and reading should be possible.
While this will most certainly lead to complaints, it is definitely a good thing and long awaited change.
AFAIK, they plan to internally use a cloud based Jira (you won't get any other) while getting rid of the public QP instance in favor of limited public access to the new one. At least that has been discussed for quite a while, because the synchronization between the internal and external instance was error prone and often lagging behind. So the statement that the current system seems to work fine probably didn't take into account the whole picture.
On the other hand, as I mentioned in my initial post, such criticism was somehow expected. The same as my expectations are mostly based on speculation, so are others. Personally I just feel better expecting an improvement. So for me it stays to be a good thing until it turns out otherwise.