When you upload an interface it says on addons:
This option will be enabled on interfaces that have been abandoned or not updated for a length of time automatically.
Since Faetyl has only vanished for 4 months so far I think I'll not apply that rule for a while yet (PM Dolby if you think it should already be applied, I'll not make that call).
If you update will work outside of ThorUI, I'd say post it in the general bank mods section, if it will only work in ThorUI, I'd say post it in the patches and addons section. That's just a suggestion though.
And if you keep updating ThorUI, you can of course also post a "Reborn" version of the entire set or something like that.