I've replied to your query on the plugin page but here it is again.
First, the default view is the view that will open whenever you access the activity without specifying a view. This is typically the case when you enter the activity from its link on the course page, but there are other occasions where this may happen. It's a fallback view so to speak. You may use it for creating the entries but it's not necessary and in many use cases it is not used for that.
Now, if you want to open entry details from one view in another view you can use the pattern EAC:more:target-view-name. For example, if you have the views List and Single and you want to allow the user to open the entry in the Single view from the List view you can add to the entry template in the List view the pattern EAC:more:Single.
The same approach holds also for editing an entry, with the pattern EAC:edit:target-view-name. In this case you can also set the editing view to redirect to another view (e.g. back to the List view) after saving the edited entry.