This is most certainly not good, with the losses of Elephant and KIK powders, losing GOEX would be a huge blow to the black-powder community. This would most likely appear to be stemming from a risk/benefit assessment of GOEX going something along the lines of: Hodgdon already owns the majority of BP substitute powders which are much safer to manufacture, the plant still poses a giant hazard even with modern production capabilities - this fire likely rang some alarm bells at Hodgdon HQ.
So in essence, the continued production of GOEX is still dangerous and eats into the market share of their other less dangerous (to produce) BP subs. In their eyes, shutting down GOEX production not only eliminates a huge risk, it also likely will not impact them too bad financially as their substitute powders will just regain a large portion of the market share. And it's not like they need to keep it around for the money right now anyways, most of their smokeless powders are just flying off the shelves in the USA so fast stores have trouble keeping stock.
I don't really agree with it, but as a large company it isn't total nonsense to choose this avenue