And, of course, history never saw great empires which eventually fell appart into smaller nations, often due to combinations of revolts and external wars... except spain. Well, and rome. And byzantium. And the ottomans, napoleonic france, brittian, the umayad muslims, alexander the great's empire... well, you get the point.
No I didn't get your point, but that is mainly because you didn't make one
None of you examples are to the point.
Spain, invaded and vassalized plus colonial revolts and war against Great Britain means that colonial revolts should succeed? No, they only did so after the occupation, war and blockade was ended after the Napoleonic Wars. Spanish colonial possessions remained fiercely loyal during the worst of the war as the British found out during their Rio Plata expedition.
Rome, at what point did roman peasants and anti-roman nationalists revolt?
Byzantinum, same question.
Ottomans, non-state religion revolters in highly intolerant empire. EUIII has mechanism.
Napoleonic France lost it's non-french provinces. This does not happen with the WE-WC-MP snowball, you lose everything. Only rebels against Napoleonic France inside Napoleonic France? Yes, Vendeé Royalists and Tyrol Nationalists Not a single peasant revolt in core cosmopolitaine provinces.
Britain - I blame the anti-colonialist Labour government of Clement Atlee. Apart from Aden, not a single colonial revolt succeeded. In fact in more than one place the successful suppression of revolt was a pre-requisite for granting independence (e.g. Malaya and Kenya)
I don't know enough about the Umayaids
Nobody, and I mean Nobody invaded Alexanders Empire. It is a case of 10 pretenders, not peasants revolting.
Put a country under stress and it will fail, yes. But do tell me since all your examples are outside of the time period of this game (yes I know Bolivar was in revolt in 1821 and that Byzantinum survived past the starting date) can you tell me a country which was driven to exhaustion by invasions and the ravages of war? Poland during the Deluge. And what happened? Did Mazovia, Krakow, Ukraine, Lithuania, Polotsk, The Knights and Kurland all declare independence? Nope, the country was destroyed and ravaged, the people to this day talk about it, but not a single sq meter of land was lost. The polish peasants rose against the swedes, not the polish king.