I was really just "wondering out loud" about whether you could solve the problem of having Armbian-specific tools that need maintenance by instead re-using the existing, and maintained, functionality in Debian Installer.
In the past I've used Martin Michlmayr's installer for the QNAP-TS119, which works more like this. I think one of the installation methods for the NSLU2 was also based on a modified Debian Installer.
Anyway just a thought.
I've been finding a few more of these differences. For example, find /etc -name '*armbian*'. It would be useful to have a list, maybe a diff of the filesystems trees with an unmodified Debian or something. I'm pretty familiar with how vanilla Debian works and I worry that the superficial similarity is misleading.
This is just some honest feedback from an old Debian and ARM user but new Armbian user. I appreciate that resources are limited; I know how that feels. Thanks again for all the hard work.