This new UI looks like less stuff fits into the active area. On my 1920 x 1080 display the active area only takes about 1/3 of the screen real estate if the window is maximized. The UI does not scale with window resizing.
Any possibility of including a UI option for those that want to use the site on common desktop screen resolutions? Making use of available screen real estate would reduce the amount of scrolling when reading through posts.