Currently, if you are archiving a message (via button or shortcut) then the "read panes" (opened email) is left blank and you need to manually click on the next email. It would make sense for the application to automatically select the next message in the current folder. This would allow one to quickly archive a bunch of messages by pressing A repeatedly.

I know that you can remedy this somewhat by using keyboard to move to the next message and open it, and archive but it makes very little logical sense to not automatically open the next message.