What a complete change! Still getting used to it. It looks like they've taken a step backwards in HI Ergo to me. Maybe it's just such a big update I need to get my head around it. The loss of coverflow is the one thing I miss most...
My only issue with rolling back is that Apple normally make some essential part of using their gear dependant upon using the latest version of iTunes. Whether it's film rentals, support for the latest iDevice, or in one instance I remember a while back, even being able to login to the store!