I think a good feature for unity to have would be "Universal resolutions" for the editors game window. Currently, if you add a resolution on one platform like Standalone, then switch platforms, you have to add more resolutions. But if your making a cross-platform game and need to swap back and forth from time to time, it makes more sense to have those resolutions available to all platforms rather than needing to set them on each and every platform manually. This also makes it easier to make sure your not breaking the UI on a certain resolution or aspect ratio, without having to swap platforms a lot. If there is already a way to do that - I am not aware of it. I'd be happy with an editorscript that does some voodoo magic that makes that possible!