I think it would be nice to be able to add terms on the node/add form (I use commerce_backoffice) when providing tags to the catalog.
Right now, I have a few taxonomy vocabularies. When I use widgets like those provided by the Hierarchical Select module, or the Autocomplete_deluxe module, which provide the option to add terms to the vocabulary by tagging them or, in the case of Hierarchical Select even on select lists by choosing 'create new term' it produces errors and terms are not stored correctly.
Currently, it seems only Drupal core's taxonomy autocomplete tagging widget works. The above mentioned widgets, cause errors and terms are not stored correctly.