When I switched from OSC 2.2 to 2.3.1, I noticed the new admin page right away. It was lovely
AND Customizable! Unfortunately, it presents customers and orders in funny sort orders, usually with the last one touched, first. Now, I could see this being handy in some ways, but I use the status for customer information, and to help organize the shop. So, once an order it "shipped" it's not as relevant as the rest.
That's about when I started missing the little info box on the old admin page. The one that displayed all the order statuses with a clickable link to see only those orders. In short, this is a dashboard module that brings that little info box to the 2.3.1 admin page.