Two things that can be irritating with UMG are widgets getting in the way of other widgets, and being unable to see all of the content in a scrollbox. My suggestions :
- Allow widgets to be hidden in the editor. Sometimes you want to have nested menus which are hidden in game until you go through the menus. In the editor however, they are always visible and obscure your ability to edit the widgets behind it.
- Be able to use the scroll bar for scroll boxes in the editor, as well as in the game - allowing for easier editing of the items inside the scroll box.