Lets just call alt-history xP.
Jokes aside, I think your arguments are quite decisive in what helping us choose an option.
The one thing, I'll add in is that, Someone can fill in the requested culture but I would want to wait till that culture mod comes out before modding them in. I think its an overkill to preemptively mod in culture titles, for a culture that is not present yet.
In case no quality mods have been done that culture till the time we polish up this mod. Then, We can then step in and create a sub mod (as
@Viridianus suggested) .
I hope this sounds okay to everyone involved here.