The ability to drag select elements without dragging elements. This is basically what Figma has called "Deep Selection" where if I press and hold Ctrl and drag, I can select all elements without also dragging any element below the cursor.

This is useful to select nested elements and you dont want to drag the background element, and you dont want to have to manually lock those elements. Being able to just hit a keyboard modifier and drag nested child layers would be extremely valuable to make quick adjustments to UI designs.