I think this is a good start for exploring some different ideas Facebook could do with their website. I think there are some interesting concepts that you've come up with.
However, I think the look of Facebook's current site works. It's minimal, simple, clean, and easy to navigate. Some of the elements that you've introduced make the site seem overworked and over-designed. You might want to think about paying attention to consistent sizes of things and focus on creating a hierarchy on the site, what do you want people to focus on?