I’d totally accept a Battle of Wigglypants because it’s fairly easy to assume that there were many more battles than few we saw (which is of course not to mention the obvious fact here which is that Sith are in SW movies which most people have seen, though I know that’s not the point). Maz is supposedly many hundreds of years old and if she only mentioned the Empire and The First Order as the threats “through the ages” that would seem kind of “WTF,” to me, at least. Like there were no evil threats before the Empire?
As for clones vs. Alderaan, this is where I really don’t get it. In my mind there’s no indication whatsoever that cloning is a completely ancient and defunct practice. I don’t know where you’re getting that idea from.