Looks like Boeing pulled a first rate cock-up choosing an unsafe battery architecture and then pretending the problems were manageable and "not flight safety" risks. I have to think there are probably engineers at Boeing who will eventually come forward as whistle-blowers if it turns out they had financially driven time pressures applied to their work. This will be especially true if Boeing tries to hang a few of them as fall guys.
Ironically, CX will probably get a screaming deal on 787-10s due to this situation.