I am very pleased with Affinity Publisher, it is an awesome first release!
With that said, I also want the packaging feature. I package all projects before moving them to my Drobo "cold storage" folder for long-term archiving. While I am generally very organized and careful in my workflow, it is wonderful peace of mind to I know without a doubt, that absolutely everything needed for the project has been archived.
I'd prefer not to embed files, it's just not a workflow that I like.
Packaging the document to include all assets and fonts etc ( like InDesign) is a feature that would be 100% mandatory for me to be able to switch from InDesign to Affinity Publisher. and oh boy do I ever want to switch to affinity Publisher!!!