It would be great if we could options to either darken the transparent background or create/select our own color/pattern for transparent backgrounds. As someone who works daily on designs that use transparent backgrounds, the default pattern is just a bit harsh on the eyes, mainly with brightness. The only work-around I've come across is just have a dark color as the background, then hiding the layer at export which can become a hassle, especially if you go back and forth with concepts/versions/tweaks.
