We felt the need. The need to improve our drag and drop functionality in the web UI builder. Why? Because this feature is very important to create web pages with the web UI builder easily. So we made two improvements while dragging a component to the canvas: the editor is now more stable in finding his drag-target (which caused flickering), and the drag target is now always shown correctly (sometimes the wrong component target was previewed).
The drag and drop improvements in the web UI builder