Sort the Pick List by Weight

As a suggestion, it would be awesome to have the Pick List sorted by weight. 

The heaviest picks, would be first.  
This is how most order pickers pick, they put the heaviest items as a base.
They put the heaviest items as a base, and put the lightest items on top of it.  
(As long as the heavy items on the bottom are not fragile of course). 

This is a great way to build up an order to be shipped out.