1). I would like to be able to switch from a 'details' view (as I call your actual file view) to some 'thumbnails' (large icons) view, to small icons view. In a thumbnails view it would be easier to organise pictures in an expected order, sorted based on their visual contents rather than based on their file names. Then it should be possible to also make a selection in that window and return to the 'details' window (keeping the order and the selection of files) and then make the bulk rename. The tumbnails view should offer more or less detailed (bigger and smaller) icons depending on the preferences of the user, depending on his preference to better see the contents of the icons, or being able to sort more items in a single viewing window.
2). I would also expected to be able to drag-and-drop multiple (selected) files at once to their desired place.