I just had an afterthought, as this scenario just popped up again for me/my client.

It'd be an incredibly powerful core function to be able to uniquely set reminders/invoice notifications for domains AND other services.

They're currently all grouped together (for 60 day, 30, 15, 1, 5 day reminder, etc).

Where as that format works great for domain expiration/renewal reminders, there's not really such a need for the same amount of emails for services such as hosting, etc.