I think their treatment of the victim is really a sideshow. The real issue here is that the underlying assumption that it was relatively safe to let total strangers into your home has been publicly shattered.
It's not a "real" issue, it's more of a temporary difficulty. AirBnB's business exists since the dawn of time. A setback, if you prefer.
Change is often a good thing, but I don't think they should make hasty "significant structural change" because it's clearly not what's needed right now. Subtle evolution is much better to improve trust.