I'm sure like myself many of you use the right click 'Create' button on the block diagram often to create controls/indicators/constants of the appropriate type for an existing node. It's a quick and useful tool but it can be a pain at times, especially when you are trying to use it in, say, a while loop with limited space. The newly created object is plonked down and resizes your loop which needs to be rejigged back to how you wanted it.
How about an option where the newly created object is stuck to the cursor, allowing the user to place it cleanly with a second click? Maybe this would only happen in instances where it would otherwise cause the aforementioned resizing.