Maybe I've grown too used to the current design, but my first reaction is - yuck, too much like a http://everyfuckingwebsite.com/ clone. I'll try to articulate my dislike as something constructive, and submit feedback directly.
The fact that they are even previewing the website with dummy content tells me that they are focusing on the wrong things.
There's also a bit of information overload going on in the menus. I don't know. I'm not entirely a fan of the bold colors. I personally would have just liked an iteration of the current site, rather than a full revamp.
Something along the lines of Github's clean white background and minimalistic layout would, I think, suit a Python site very well.
I could just be me fearing change, though..
Granted, it is a bit easier to make a succinct website for something like Git rather than the entire Python project.