Thank you for improving the communication! There’s a bunch of us who appreciate it 
I’m a little concerned about that. Mostly because of this:
On the one hand, it’s great that the purpose of the public beta has been officially clarified. On the other hand, I find it concerning that the clarification only talks about identifying critical issues and preparing for post-launch updates, while carefully avoiding any mention of fixing those issues before the launch.
Looking at the reactions to the announcements of public beta delays, most of the reactions were fairly positive. Sure, there were those who complained about the delays, but most posts were along the lines of “we prefer delays if that means improving the quality of the release”.
It wouldn’t be that much of a stretch to imagine that delaying the live release to fix game-breaking bugs identified in public beta would be met with a similar attitude of approval. Then again, I understand the higher-ups aren’t really looking for “approval” when they’re looking at the bottom line. 
TL;DR: Let’s hope that if we help you “identify critical issues” during the public beta, the team will employ measures that go beyond “preparing for […] post-launch updates” and decide to delay the launch if the identified issues are really critical 