
A third column consisting of
1) toggle Album art or information summary (gather/display basic info for current track from tag/library)
2) The Now playing playlist
3) the player moved from the left side
This design frees up vertical space for the tree view (I have a huge library and scroll often through artists), and allows adjustment of the horizontal space..without removing the player. It also has a better focus, base tree list and library on left, current node display in the middle, and current track information and controls on the right. And of course the third column should be able to be configured (hide sections, move sections up/down, maybe more?), and the whole column be turned off. Maybe eventually be able to drag sections back and forth from left to right column.
Please post your comments on this.