It never really stopped, it keept chugging through the entire century more or less with loud outburts in the 1840s and 1860s-70s before quieting down a bit toward the last few decades. Just from 1821 to 1836, you get Greece, Belgium, and all of the Latin American wars of independence. Though I get what you mean with the specific emphasis on the French Revolution.
I would hate for Victoria to end in the Belle Epoch. That would just be a total anti-climax. The World Wars are my favorite point in the game really. I'm really interested in seeing how they handle it.
However, there is a clear era break in and around the Congress of Vienna, where you have the emergence of a new balance of power in Europe that will remain more or less unbroken, despite German and Italian unification, all the way until 1914. In between 1815 and 1914 there is a distinct lack of a truly monumental pan-European war that changed things in the same way that the Revolutionary/Napoleonic Wars changed Europe. And no, the Franco-Prussian War doesn't count. While it's an obvious prelude to the Great War, with the formation of Germany, and a few cracks began to form under the surface, the Post-Vienna balance of power kept on going until 1914 (though it obviously could've ended sooner than 1914, I'm just using historical dates as a benchmark of sorts).
The 1815-1914 period, from a European perspective at least, represents its own distinct era quite clearly and considering that the era represents the solidification of European Global Dominance (and the seeds of its eventual destruction) I think it's the European perspective that we should focus on for deciding things like what time periods should be included.
As for the Greek, Belgian, and Latin American Revolutions? Well the former two represent more of a settling effect of the new balance of power rather than a radical change. And the Latin American Revolutions? Well, Latin America, sorry to say to our Latin American forum members, doesn't really factor into European matters all that much, a bit perhaps, but the revolutions certainly didn't radically affect the European balance of power.
The revolutions of 1848? It was a bit of a dud for the most part to be honest and I've already mentioned the German and Italian unifications, which is what I assume you meant by revolutions in the 1860s-70s period?
