I'm ALL for change, and I like some of the ideas being implemented (tabs, applications being more hidden)...
...but overall I'm not loving it.
And no, I'm not unhappy just because some things were switched around. That's fine, if it ultimately works for the better. However, many features I used often and that were easily accessible before, I now have to scroll down in order to see, which is a drag. There's no way to rearrange the homescreen at the moment, but hopefully that's something they can allow in the final version.
The excessive amount of white space just looks....wrong. And many of the features just don't have optimal placement, in my opinion. In an effort to make things more simplified and streamlined, it "feels" more confusing than ever.
But I'm going to use the new version for a while (I see you can switch back to old version in the corner, at least), and see if I can get used to it. If not, I'll probably be joining the petitions to give us our old Facebook back...