Give Billing Contacts access to invoices.
Today, only Admins have that access, for reasons of privacy/security.
I as Admin can decide whether someone is Admin or not and can access all the account information.
I as Admin can put someone as billing contact and they get a whole bunch of emails but access to nothing useful (i.e. the invoices).
If I can give someone access as admin then why can’t i give someone granular access to invoices.
In my view it’s a design mistake 
At the end of the day - my identity is ‘breached’ if I give someone admin details.
Why can’t i breach it for the billing contact ?