I see your point about the larger fonts but I have used the sunburn theme for a while in my editor (not anymore thought in favor of slightly customized naquadah[1] ) and I feel quite a bit more comfortable reading code in familiar coloring.
I chose this color scheme because sunburn dark is quite popular.
Perhaps your color vision is now at the point where you should consider loading an accessibility stylesheet into your browser. I don't look forward to the day when I am required to do this, but I do know that it will inevitably arrive.
It seems that some of the stylesheets are broken for HTTPS. Note that this is not https-everywhere breaking the site; simply switch the URL to https://, and you will see what I see.
