So we need to add an extra shipping method then just for EUR. Now when I create a sandbox and do a checkout with my own address it's not working out of the box. Since the shipping UPS Ground for my zone is in EUR. 

I do understand the need for the other use case, so I will add a shipping method back in there with the EUR currency. So people wo run the samples on a store with the currency set to EUR have a working checkout as well.