Technically FoV could have been released on a separate disk for Xbox, but Larian couldn't get just the add-on published. I think D2:ED sold slightly less than Dragon Age, so there is a smaller pool of potential customers (not to mention a much, much smaller marketing budget). Also, FoV was initially planned as DLC on Xbox, but became too large, so there may have been a problem due to delaying looking for a publisher, or a lack of publisher interest in an add-on in addition to the remastered version.
