Actually I like the current (3.3.1(217)) style a lot!! I see no good reasons to change that.
I am working in split screen mode, so I don’ see any window chrome. The toolbar looks nice at the topmost position of my screen. (BTW: I have my e-mail client on the left, TP on the right - this works absolutely brilliant for me, as e-mail communication (unfortunately) is a large portion of my job)
Please consider full screen / split screen mode in your decision!
Thank you
Thomas