It would be great to set different default product ordering per category or menu item. Like the global value is ordering by product name but you could set ordering by price for a specific category or menu item.
With this feature you could easily create menu items for
- latest products - created_on desc
- most popular products - product_sales desc
- etc
Also would be useful when you need to set a specific manual ordering in one specific category instead a global option.
There are great option for different categories on "virtuemart category view settings" tab, it could be one of them