Primo è necessario da avere una lista x discussione...
For example, in the DBM army lists all of the later Spanish "Christian" medieval armies were covered by one list, "Medieval Spanish and Portuguese". Xavier split this one list into separate lists where the differences were significant enough to mean they should be in separate lists. Medieval Castillian to SHNC being the obvious example - from primarily knights to the dependence on infantry, as well as reorganisation by the state.
So, for writing new lists or revising old ones:
1. Does the evidence you have support the idea there should be either a new list or the list should be split? Reducing complexity is also argument in splitting lists, as well as significant differences between armies. For example, Condotta is one of the more complex lists, but were the armies of the different states significantly different from one another to justify splitting the army list? Are their any significant troops that are missing which should be in the list? (Sorry, but a Faenza list with 100 superior palio players is unlikely to be included

)
2. If you are adding new options to an existing list, or proposing significant changes, what is the supporting evidence? For example, again in the Italian Condotta list, I have the impression the minimum number of mercenary men-at-arms is a bit rigid. Did, for example, Florence use significantly more or less? (Just an example, I don't know the answer, but the current list suggests Florentine armies were primarily infantry based.)
3. Classification of troops is, or should be done, relative to their historical opponents, not on personal views or other factors. For example, I think Etruscans should all be superior spear

, but relative to their historical opponents they are probably now about right. And it's a much better list than it was in DBM, where, in my view, the classification seemed more based on a bias for Romans always being wonderful, as well as the lies of that terrible propagandist Livy
Also remember revision of army lists is a very slow process, so don't expect acceptance overnight!

I wouldn't expect to see new FoGAM lists for several years, if at all. In the DBx world, if I remember correctly, DBM was first published 1993. So if you include DBMM, the army lists are on their third revision. That's an average of every 6 years, not so fast.