Worldwide only option in Trends is a pain as it just comes up with loads of foreign (to me) info.
Hope that bugs sorted soon as I use it regular.
Did you try clicking the settings icon on the right hand side when you go in to trends? For me it gives me a list just like it used to.
I upgraded and I'm liking it - I still have access to the old one in case I decide I need to go back. The white bar at the top *might* be a bit too much, but we'll see if my eyes adjust. So far I'm quite liking it and I don't mind paying them when it's the best Twitter app out there... Miles above Twitteriffic IMO, and I have both. (I've spent way too much money on Twitter apps...)