Not entirely pointless. Item editing in MetEdit is problematic because it only allows you to edit the first item that appears in each row of the map. For the benefit of anyone else who is confused, this is how you move items from one map location to another in Editroid.
In Editroid 2.x, in the view menu, you can choose which levels to show items for. Items will show up on the mini-map and you can drag them around to change which screen they are in. Note that items on the same row move somewhat as a unit. Select an item within the screen editor to edit its properties. Editroid 2.2 adds an advanced item editor that gives you more flexibility and allows you to place additional items and remove items, but the advanced item editor is only accessible on expanded ROMs.
In Editroid 3.x, you can show items on the map but you may not drag them around. To move items to a different screen, use the advanced item editor, which, again, requires an expanded ROM.