Here's a new perspective on the battery fires:
=>The world did NOT see videos of the battery pack on fire.
Instead, we saw sensational images of the FRUNK on fire (and of course no one mentions that the passenger compartment remained completely undamaged). The frunk fires probably grew in intensity long after the battery pack stopped venting. Thus if Tesla could make the frunk fire resistant, Fox News will need to look elsewhere for ratings-inspiring videos as the hapless caltop-damaged Tesla on the side of the road will just vent white smoke for a while.
=> What if Tesla were to use flame resistant material as upholstery to line the frunk? In this case, the venting battery pack flames,(or maybe it was just super-heated gas and not actually flames) would after a short period of time, subside without resulting in a CAR fire.
One such material might be Nomex, commonly used in fabricating flame-proof safety suits:
Still, it's my personal belief that the fires are not a safety issue due to Telsa's isolation (fireproofing) of the passenger compartment, and so they don't really need to change anything.