Problem for me and apparently for many other people too is that some left panel items I frequently need are on the bottom part and need to scroll to reach those while others I very rarely need are visible all the time. Solution: Make left panel configurable in a way that you could change the order sections appear in it.

For example I would like to see History, Created by and Last edited by fields higher and would drop height and lock levels to the bottom of the list, it would result in much better usability for me.