I often find myself having to hunt quite a bit at the bottom or top of a bloc, before the blue graphic plus sign becomes visible, so I can add another bloc. I can’t help feeling it should easier to locate, rather than only appear when the cursor passes directly over the hidden graphic.
Deleting a bloc is pretty easy, because the blue square remains visible as long as the bloc is selected, but on a big wide screen I effectively have to scrabble around the bottom or top of the bloc to locate an invisible item that is roughly 50 pixels square before it appears. Given that it takes barely a second for a page to preview I can’t help feeling it would be hugely helpful if the plus sign was more visible in edit mode.