Yea, it's starting to drive me crazy watching people complain about this.
So you don't like the new UI so you can:
1. Reconfigure it to look the way you want.
2. Change to another browser that looks the same as the one you are complaining about and gives you no customizability whatsoever.
When I upgraded to 4.0 way back when, I chose option #1 and never looked back.