I hope the next DLC brings with it some minor factions, be they royal houses or otherwise. But if not, it would be a good time to rework the older minor factions, even if not at the release of this DLC, but with a promise that they will do so at some point.
The developers have let us know that they share our enthusiasm and like these kinds of ideas. What is the problem that does not allow this?
[Minor Natives topic] Post here your ideas for every single minor natives so the devs can look at - #146 by Ippert
This has been one of the most popular requests on the forums since shortly after the release of the Definitive Edition and there have been many discussions about how this could be done.
[Minor Natives topic] Post here your ideas for every single minor natives so the devs can look at
Will the devs ever make minor native civs useful?
Natives or minor factions (General discussion)
How to make the native semi-civ more useful?
Minor Civilizations Should Have Passive Abilities
Catalog of proposals on minor factions/civilizations (AOE-3 BASIC + TWC + TAD)
All Minor Civs (Natives) Rework Concept (and some new ones)
While they have made subtle efforts to improve the viability of alliances with natives, and many of these units and technologies are indeed useful, there are many that leave much to be desired.
It would be nice to have new units and technologies in these native settlements, and to rework the units and technologies/upgrades if necessary.
Adding new minor factions to existing maps to fill in the gaps and inconsistencies would also be something I would appreciate.