Free Zoom or select scale? (GUI size)

Why doesn’t Retrologue 2 have the ability to free zoom the plugin or at least select a scale factor? At 1080p, the controls are super tiny and a strain on the eyes. But Retrologue wants my system scaling at 150% (ridiculous!) before it changes size and becomes un-usably massive. The latter part proves that the graphics exist in HD, so why not just let us control our own zoom factor with a menu option?