Misery loves company, eh? I'm glad I'm not the only one having this issue and thankful I've only been dealing with this for the past month...

We were using QB Enterprise and switched to QBO, biggest mistake of my life. Every single thing that I have an issue with (and honestly 90% of the issues has to do with customers/estimates/billing) QB says the same thing you've seen repeated here from every official response. 'Sorry, that isn't possible', 'we're working on fixing that', or 'here is a work around', which takes 10 times longer than if you were just able to do it the regular way to begin with, or the work around looks terrible. With the other QB products available I am surprised this one is so cumbersome and limiting. In my 30 year career I have never had a conversion go so completely off the tracks and dislike an accounting program as much as I do QuickBooks Online. 

As others have stated the template invoices do not work because even though they are customizable, they are severally limited as to what you can customize, include or exclude. And don't get me started on where the PAID stamp prints... over the description... so you can't read what is behind it. I know we aren't the only company that has to either print a duplicate paid copy of an invoice for a customer (crazy thing, they like to be able to read the description even if they have paid) or we've provided a service at no charge and want to show the customer what we did, so they really haven't 'paid' for services, we don't need the PAID stamp mucking things up.

And please don't bother telling me to contact customer support and get my information added to the list for updates, I've seen the instructions a few dozen times in the above responses...