What I really miss as a feature : Select many messages in the folder view, and move them all at once to another folder (either with the menu or with a swipe). I have to do them one by one (using a swipe).
And a little bug/misfeature : when trying to move a message to the last folder in the list, this folder appears “under” the navigation buttons, by transparency. See attached screenshot.
But it only works when you are in a single mailbox, and I was using the “unified reception mailbox”, as I have multiple accounts, and it does not propose the “move” feature in the menu in this case.
So I refine my suggestion : if all the selected emails are from the same account/mailbox, propose the “move” feature.