I just came on to say exactly the same.
I actually prefer the previous icons style, although the new ones are quite similar. But they are smaller, I think too small for me. Having used the last set of icons for many years, I have become accustomed to their size and position, and now the UI feels a little awkward. First time I opened this new version, I pressed the wrong toolbar button.
I can't see anywhere to select the icon set/size. I hope there's a way to restore the previous set; I'm just too set in my ways I think.