The upgraded theme editor introduces more precise control over UI customization with support for component-specific styling. You can now apply different fonts, colors, and spacing to individual elements like buttons and labels. The editor includes built-in sound effect support, allowing you to add hover and click sounds with adjustable volume. Fine-tune margins and padding for each component. Visual states including active, hover and pressed can be customized separately. The improvements focus on giving designers exact control over every aspect of their interface while maintaining an efficient workflow.