You dutifully upload it to the List Template Gallery in a site collection and create a new one. All seems well - views, etc. all look good. But then you go to add an item and you get this:
The SPListItem being updated was not retrieved with all taxonomy fields
Ah....must be a delay or something right? Wrong. When you save a template it embeds the Site Collection ID into the template. This 'breaks' the connection with the taxonomy field because it belongs to the original site. Even though the field is defined in the content hub, the field definition is broken.
Your only choice - recreate the list/library template in each site collection. A pure pain!