I would have thought in case 2 it would point directly to the Download as is the situation with the Joomla! search.
Then has the plugin a bug! When the 'view details page' is not used, we can not create links to him.
If they do, then this is a contradiction. Or we must give the admins a hint in the description from this option. Edit:
Maybe should we discuss a little bit about the option: "View Download detail page".
My opinion is, that it makes only then sense to deactivate this option, when all Downloads have stored only very low informations in the db.
As example only the title, size, date etc. but not descriptions.