Hey,
Here’s a suggestion. There are a bunch of very helpful filters, how about adding another that would show all unpaid invoices that were created from recurring invoices? With this I could easily stay on top of my subscriptions, seeing them separately from other unpaid invoices (which are usually dealt differently).
If that is not possible, here’s another suggestion: how about adding a column to the RECURRING INVOICES screen showing how much recurring invoices are pending/unpaid for a customer? I think it would look good after the LAST SENT column.