Thank you for posting these suggestions!
In the coming few months, the team is focusing on building the new cart and also to make sure that we build more features that will help seller generate more sales. The main focus is still on attracting more buyers to the site.
Being able to generate sales report and to search and sort within invoices is definitely a good tool for sellers and we will be putting these into the feature queue list. This feature will come after the new shopping cart is rolled out. The invoice sorting feature will be released earlier.