When prototyping it is sometimes difficult to use the pick-whip to select the target screen if it is far away. The alternative is to choose the screen from the drop down menu, which I think works fine other than the fact that it requires you to be able to identify the screen is from the artboard name only. It would be helpful to see a preview of the artboard along with the name.

Additionally, it would be great if there was some visual cue as to what elements already have hotspots assigned to them. Right now it seems like you can only see existing hotspots by clicking on that element.