Too bad! But of course, I do understand that the scarce developer resources we have are be focused on maturing the main game.
I am not able to contribute myself unfortunately, as well.
Remains me being extremly grateful for all the great work that already went into this superb game!
Was having a look at it now:
Unit Tiers
-"Auxiliary" would be better than "Allied". "Allied" is way more general than what you want.
-I guess you couldn't solve how to change Champions to Elite, and the XP progression as Recruit->Seasoned->Veteran, which would be better according to the terminology actually used.
-You seem to characterise Mercenaries other way around. They should be veterans selling their services (maxed XP), and would use local equipment if it's better (affected by Forge techs).
Glossary
-"Auxiliary" now seems what you defined before as "Allied", and "Allied" seems to be what it should. I would have then thought that in Unit Tiers you made a mistake, but then all the following tables repeat that.
The rest is quite a bunch of information that would require a lot of time to understand. Maybe something friendlier eventually would be to somehow briefly state the differences with vanilla in https://jeff-web-sketch.github.io/ClassicalWarfareAEASite/spartans.html, for example. And in "16 historically accurate civilizations", that's simply not true, at most you could write "16 civilizations (striving to be historically accurate)". I guess you have still focused mostly on units stats, since there are simple corrections I think I already mentioned to you that are still not implemented, in the Spartans for example.