Aside from how it looks, there are some real usability gaffes with the new design. For instance, there’s no reason to have two profile links in the top nav bar (one that says “profile” and one that says one’s name), especially when one of those replaces a button as important as the Home link (which has been moved to where the old Profile button was). Also, when going between the Home page and profile pages, it looks like the whole site flips around. For the home page, the feed is on the left and there is a sidebar on the right. On any profile page, the feed is on the right and there is a sidebar on the left. That’s just poor design.
I agree that the tabbed profile seem like a good idea, but the reality is that it creates more pageloads, hence more adloads. That’s the point of the tabs—not to hide applications. But it is nice that the clutter has been reduced in that regard. I’m a little frustrated with the discrete Info tab, though.