Had a chance to poke at the beta with some mobile devices. As someone who interacts (reading and posting) with rpol the majority of the time via a mobile device, the orientation towards a more mobile friendly format is welcome. While the site is fairly usable as is, there are some issues that crop up from time to time that hopefully the new format will solve.
From what exists so far, the beta is certainly a bit easier to use on mobile over the current design. The scaling works fairly well and menus are fairly responsive.
There is one specific issue I ran into with the scaling that I did want to point out however. Given that "How the main menu, game menu, thread view and compose screens look and work. These are somewhat, but not completely, finished.", I don't know if it's a known issue. So if it is, please feel free to ignore.
I took a few screenshots to demonstrate the issues, as I figured that would be easier than describing them.
The first two were on a tablet, using Amazon's Silk browser, at a resolution of 2560x1600. A bit of overlap between the right side navigation menu and the text formatting tools in the message posting screen and in the post preview screen the same issue with the curly graphics.
http://i63.tinypic.com/692o02.jpg
http://i67.tinypic.com/11imwz6.jpg
The second trio were taken on a phone, using Microsoft's Edge browser, at a resolution of 1440 x 2560.
You can see the same issue with the same design elements in the post and post preview screen, but they're a bit more severe in terms of blocking other elements of the site. The first shot shows the way the post message screen is initially presented.
http://i63.tinypic.com/11l4h03.jpg
The second two show the entirety once it has been pinched and zoomed out to show the elements that are initially off screen.
http://i63.tinypic.com/692o02.jpg
http://i67.tinypic.com/11imwz6.jpg
Generally the direction of the beta seems to be going in a positive direction, whether via desktop or mobile. I think in the end it will be rather worthwhile.