Seconded, of course.

No solution outside ZOS could be absolutely perfect as not everybody would use it, however as the site is the source of all the downloads, Minion or not, maybe we can design something a little more flexible here too.

like a tag to point what version of our file to download by default (and by Minion) but let the "futures" updates downloadable already and/or conditional with the current live API (that by Minion only or it would be hard for the Site to tell what is the current game version not knowing what server).

maybe a checkbox prechecked : "download this version as default" and the possibility to point to another later.
No idea how to handle that for the site to list the "updated" addons though... but that's just technical I guess.

with a default behavior on the last updated file if nothing is checked, because we might not be carefull of these checkboxes between 2 DLC.

There would be errors and mischecked boxes, but maybe not more than forgotten API edit or the like.

But the best solution would be the multiple APIversion handling, i can't find any drawback to it.