If you're a programmer, you'll find yourself constantly switching from Visual Studio to Unity to change scripts.
When you've changed the script, Unity takes a while to process the changed script.
During this processing, Unity shows no visual feedback.
One finds himself clicking on the UI buttons (like "Projects", "Console", "Clear" or any other button in the Unity Editor) to find out if Unity has finished processing.
An easy solution to this problem would be to simply show a WaitCursor while Unity processes the edited script.
This would help programmers to quickly see when Unity has finished processing the script.