Yes. Lion can have the scroll arrows put back into its windows. I have done it. I have also done it with with some cool effects thrown in for fun. It is done by modifying the Artfile. Use artFileTool. Google is your friend here. The path to the Artfile is: System/Library/PrivateFrameworks/CoreUI.framework/Versions/A
Remember to make a backup of the Artfile first. You must log out & back in to see the complete changes.
Btw, Path Finder also supports the 'pinch to zoom' of icons in its windows so you will have that feature back with Path Finder too!