It would be nice to be able to see a preview on the sidebar of the element that you clicked from the main artboard. That would make it just quicker for devs to download what they need, especially when clicking on layers that are buried beneath other layers. I know you can right click and select the layer you need, but sometimes layers aren't named properly, and it'll just be a great quality of life improvement to be able to preview what you are clicking on the main artboard. Most design spec platforms already have this feature.