Whether or not fire during charging lithium batteries is found to be the cause or contributed to the accident, I am hoping that all liveaboards will establish safer charging stations and protocols for lithium battery charging. There are numerous videos about lithium battery fires, aviation has battery rules, and so on.
It has been noted by Wookie that dumping lithium batteries and chargers that were smoking/burning overboard was what worked on his liveaboard for preventing fire spread on more than one occasion.
Charging stations with quick access for dumping smouldering batteries would be a plan. Likewise metal charging boxes, no easily combustible materials nearby like foam cushions. Also no charging anything below decks.
I know any future liveaboard diving for me will include asking specifics about charging batteries.
It would be wise IMO for the liveaboard industry to take charging lithium batteries seriously.
One of the liveaboards that I have been on multiple times has a firm "no electricity use in the bunk areas" policy with an exception for cpap machines - All charging must be done in the designated charging area which is in clear sight of the watch stander posted at the helm. I thought that this was very prudent the first time I saw it. Now it seems like an even better idea.