How can we improve WHMCS?

In the Customer Profile, on the Products/Services tab, there should be a field to show either the number of Days before max recurring cycles ends or a last Due Date.

I sell bundled packages which have a 24-month billing cycle and I want some way to highlight to me (and the client) when their payments will end.

It would also be most helpful to have that as part of the Email Marketer Rules so I can send my client a reminder say 3 months before the end so I can then offer them a new bundle.