>>34859541NTA, but I think you're confusing cause and symptom. The root cause is that Mori is bad at shilling, a symptom of which is that she doesn't push her content nearly as much as she should and others do, but another symptom is that she's rarely comfortable when delivering shill streams, and a third is that she has a really bad sense of how much to hype up individual announcements.
She does well when it's naturally attached to something that she actually likes doing: the birthday live announcements being the biggest example of it working out perfectly.
We won't be getting that tomorrow, nor some Holy Shittoshow on the other end of the scale. The default expectation is that we'll get the muddled energy of the store reveal wasting what should be a big milestone. It has potential to be worse if she's exhausted or otherwise checked out. I don't think there's much potential for it to be better as there's no way she's coming back from this "break" feeling refreshed and reinvigorated to lift spirits.
For me this is just a formality to get through before Mori can return to some content that she'll actually feel comfortable with.