The author of this post has nailed this on the head. Without viewable lists the discovery part of thesixtyone seems to be lost.

I was/am a big fan of the site but this new UI has kind of sucked the wind out of it for me. I feel like thesixtyone is now an extremely unintuitive web-based version of iTunes that I have absolutely no control over. Or, even worse, a weird music centered web screensaver.

The interface is definitely slick and would have made a great alternate means of using the site but as the sole method of getting around it might be a bit too cumbersome. I suppose, as with all things, people will get used to this and simmer down... at least I hope so for the sake of the folks behind the site.