The geometry here is tricky enough that I hesitated at going in that direction, but, yes, I think that's right, and makes the scenario even more questionable.

In ordinary treatments of black holes there's no sharp distinction made between the stuff that initially collapses to make the hole and stuff that falls in later. With these strange not-quite-holes it seems as if there is a sharp distinction, and that bothers me too. My sphere of massive observers is an intentional short circuit of that.