Weird that a patch with so little new content is almost 12gb, I can't imagine that fixing a spawning bug with Fire Wyverns and incompatibility with Tek Gauntlets will need a whole lot of files to be edited.
Methinks there's a load of new secret stuff that's been added to HLNA ("Misc. HLNA polish")
I think it's more likely due to the way chunking of console package builds works.
I don't know for sure though if that is the cause.