My point is to bring these packages, userspace scripts, services, helpers, the custom u-boot builds in Debian and not remove packages from Armbian (that uses upstream Debian/Ubuntu repositories) to make it be something like Debian.
I just see the value of having an interaction between Debian <-> Armbian with Debian being more stable and not having the bleeding edge features that Armbian has.
That's why I'm thinking to bring all these required hardware specific "changes" in a package that can be added during the installation, similar to the non-free hardware support for Ethernet controllers and other hardware in Debian installer.
There are many different ways to add repositories and packages that can support hardware, and some may be even integrated in the Debian backports.
Once these packages exit I can even hosted to an external deb repository or add them in a special Armbian repository that can potentially benefit many different distributions and people that struggle with compiling and finding the right firmware/u-boot unit/configuration quirk combination to support these devices.