Customers & Users
I think there is room for improving the way 'Customers' will be handled in Ubercore.
Our admin people have a lot of trouble dealing with the fact that a 'customer' does not exist until an order has been placed, even though a User for that 'Customer' is created.
I think the customer data for addresses, people, contacts etc could be better abstracted or more tightly tied to the drupal user. As it stands 'Customers' are really just fields in an order and thus you have multiple entries for each company when you View Customers.