Hi "Ten Years Gone",
I was looking for a way to disable the stupid header bar too when I saw your post. I'm with you on organization and sorting so let me offer a bit of help.
Obviously it's been a while so perhaps you've already found a way to fix this but others have not so I'm going to drop a tip if you don't mind.
To disable/enable the column browser in any playlist, first you need to go to the "View" tab on the menu bar, scroll to "View As" and select "Songs". Then, go back to the "View" tab, scroll to "Column Browser" and select "Show Column Browser".
Now if you're like me, you like to see your album art in this view. To set that up, go back to the "View" tab, scroll to and select "Show View Options". In the pop-up menu, check the boxes "Show Artwork" and "Always Show".
As for the stupid header bar, still searching but if I find the answer, conventional or otherwise, I'll post.