Would it be too much trouble to request that you allow more zoom in cinema mode? I like to render my games at 1×1 resolutions, but the horizontal fov of the games stays the same and the distance and size settings are fixed at their current maximums or minimums. I find that the compositor runs at a higher resolution when the vertical resolution is higher. That would also be nice too if the user can choose a compositor resolution. More environments with normal monitor sizes and distances such as sitting at a desk would be plus too.
Try Immersive screen mode. Recent updates have given extended control options for distance, scale, curvature, and you can now make the screen very big. Like bigger than will fit in your full fov.
For me it is most comfortable to set the screen at the farthest distance possible, and then scale the screen size to as big as needed.