From the Sorter: a checkbox option to place documents into the Reading List. This is now a multi step process where I have to find the imported file, select to include the document into the Reading List.
From the Reading List: a visual indicator for exiting the Reading List and going back to the Global Inbox. Now, at least in the dark mode, there is no way to tell how to exit the Reading List.
In DEVONthink To Go 4, the Reading List will be a smart group like all other smart groups and so the normal navigation will work just as everywhere else.