The alpha already has a great "show sections" feature, but that groups files and folders separately, and each group contains files and folders with the same 1st letter.
It would be nice if grouping under "show sections" could be done more like Windows 7. Instead of grouping under single characters, it could be grouped under a small range of characters, like "A-C", " D-F". That way, if a folder contains a lot of files having different 1st letters, a lot of otherwise wasted space would be saved.
Also, it would be nice if files and folders were grouped together with folders first and files second under the same section, unlike files and folders having their own sections like now.