Where Every Scroll is a New Adventure
See also, "We're in a drought; conserve water!" Meanwhile, bottled water companies and golf courses for rich folk empty the aquifers.
The thing is. What happened to Crowley and Aziraphale at the end of ep6 is what happens when people aren't free. And Aziraphale and Crowley are not, as demonstrated by the events of s2, free. They do not have autonomy. Crowley can be taken to hell in a swarm of flies at a Duke's whim. Aziraphale can be "erased" from existence with a book.
They do not own themselves.
All other freedoms are forfeit if you do not own yourself.
So no, I don't think "give me coffee or give me death" necessarily means anything other than:
A choice between anything and death is not actually a choice.
I think what really happened to Crowley and Aziraphale, and why they couldn't be together anymore, is that there was no choice for either of them to make that would have kept them together. Because choosing to tell heaven and hell to f*ck off so they can stay together is the secret third option that neither of them brings up in the final fifteen because guess what? They know they aren't free. They know.