You are joking, yes?
I am joking, no. This is the position that the FAA and Boeing have taken. And its not entirely unreasonable given the goal of getting the planes declared airworthy ASAP. A battery fire has now been rendered harmless. So, assuming we don't actually need the battery for any critical functions, all is well.
I'm not making a value judgment on whether this is a proper fix from a professional engineering point of view. And whether they will pursue the investigation further. That's something the company and regulators will have to weight on their conscience.