The first thing I noticed that the textcolour of a selected folder (in the list on the lefthand side in Classic View) is now white.
As that is almost invisible against the background I thought just for a minute that the selected folder name had mysteriously disappeared.
In this case a screenshot tells it all:

In case you're wondering: the name of the selected folder is MacReview.com (between Macdrifter and MacScripter)
It seems I cannot change this. Other than that the new version appears to be not much different from the previous one, based on looks.
Perhaps you could change that textcolour, it really freaks me out a little.