I have the same issue and after 3 hours with Support on the phone they really don't get the issue and the severity of the issue. 

New "Modern" design let's you preview Email View, PDF View and Payor View.... If you use the older template that does let you remove "Product/Service" column then you lose the functionality of PDF View and Payor View and uses the old formatting.  

This MUST be fixed sooner than later as its affecting my invoicing. Clients don't need to know my internal codes or products.