The in-game overlay should have scaling.
The in-game overlay is currently sized absolutely in pixels, but games run in different resolutions. When I play in 4K the overlay becomes way too small, and I bet that those playing in lower than 1080p resolutions see it too large. There should be, at least an option for scaling, to make it 25%, 50%, 100% larger or smaller, just like in the OS display options, otherwise it will be unusable in large or small resolutions. Otherwise, it would be nice if it could be resized in absolute dimensions.