Jose Manuel Jurado Diaz hits one of the three most annoying parts of dealing with bacpac files:
Today, I worked on a service request that our customer got the following error message: Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding importing a bacpac file, in this situation, was at the moment that SQLPackage was enabling (rebuilding) an index, for example, Enabling index ‘IX_MyIndex’…
The other two are, of course, getting one to export without any errors and getting one to export without timing out.