@Sheep_Overboard Yep. It is the warped lovechild of the new ABC+MyGov sites.
OTOH it could allow some fun. The old BOM site made most displays from server-side regenerated assets, unduly guarded by strict CORS. Meaning it was tricky to copy-pasta a page of your own with chunks of BOM presentation in it.
The new site has trundled the interactive stuff into ESRI mapserver endpoints. (no $urprise) Which at least for now are not using any auth/API_keys? So some hustling with Leaflet-or-similar JS gives hope to make simple refreshing displays to personal designs.
At least, this is the most optimistic spin I can find in a hour, after the initial horror.