I'm not a heavy Facebook user which is probably why I didn't even really noticed that they changed their design to be more like Twitter. It doesn't matter to me what the page looked like 'cause I can click on the "profile" link and see my profile and see the friends list (yes, I know I can click on the friend list at the top).
The first time I really tried using Facebook was when I heard they were making themselves a "platform". People can write apps that other people can access through Facebook. That could be cool, but I always had a hard time finding apps unless I saw it on someone's profile. I eventually was able to find it, but don't ask me how. With the new design, I got lost again.
Eventually I found it it at the bottom of the page (Applications > Find More). So I found an app and I guess I "installed" it, but now have no idea how to put it on my profile page like other people do.
I'm guessing that if I bothered to spend 5 minutes understanding how Facebook work that I'd be able to figure it out, but given how people have been talking about design and using Google as a poster child for suppressing it, I'm asking "Why aren't people accusing Facebook of destroying design?" Google might not be "pretty" but it's design is simple and very functional.