Automatic updates: although it is very simple to update (just one click), from general experience, users do not update anything as a rule.
This is already a thing in Aurora, Bluefin, and Bazzite’s Desktop images. Automatic updates for both system and applications installed.
Automatic encryption without password: for privacy and security reasons, automatic disk encryption could be implemented and backup codes could be saved by means of a QR code.
This would have to be added upstream by Fedora.
Gnome extension: Due to usage issues, I think that the application bar should always be visible by default, so that people gradually get used to the new Gnome paradigm.
I agree with this suggestion and there’s a few established extensions that do this already that can be installed in Extension Manager. However, I’m not sure what everyone else who maintains Bluefin and Bazzite GNOME think about this being a default.
Automatic restoration and repair
This would be difficult to implement and detect properly, and also an upstream thing with the libostree developers for system updates. For now, a manual rollback works if the current deployment is unbootable and is relatively easy. It may require reading documentation however.