I really like it....
The only things I would change are....
Make status updates and newsfeed close to each other when you scroll...these are the only two I use from the list and it takes longer to get to them...
I would like to be able to access my groups on my iPhone...right now I can only do that from my computer
When I get a notification I would like to see what that person posted instead of going to a page that says so and so posted on so and so's page...I would just like to see what was written instead of going through multiple steps.
Overall, I think it was a great update. It's working well for me, not crashing, not showing errors and it looks clean...don't love the scroll bar, but I love the new icon and think as far as most apps go it was a really nice update.