Seems like it would be convenient for users to download a 'collection' of data fields, unless I'm missing something. Perhaps that is SDK feature request worth considering?
There's a limit of 16 CIQ "things" on a watch (slots), as well as a limit to how much mass store space can be used by them (see "Manage Storage" on your phone when looking at CIQ apps on your watch), so installing a "bundle" really wouldn't work, as that would tie up resources on the watch. If you only want one of the DFs, why use the resources for more?