Hi, Jason:
I'm not so sure. In many cases, you would of course, definitely be correct. But Japan, for example, was definitely an example of a Capitalist State, I think, from my observations of its history at the time that Marx lived. And the question of course is this: when we say "Eurocentric", what do we mean? To me it means "Western Europe", ie, Germany, France, the UK, and of course, the United States, and the White parts of the British Empire (Australia, Canada, South Africa, New Zealand, and to a limited degree India). What about countries like the Ottoman Empire, in its death throes even as Marx wrote? It was clearly Feudal, but it was dying primarily because it couldn't handle the onslaught of Capitalism that was approaching it. What about the Austro-Hungarian Empire? Austria was CLEARLY Capitalist, but the Eastern, Slavic side was in many ways still quite Feudalistic.
Looking at the last mentioned State, Hitler (God forbid that I should have to bring him up as an Observant Jew, but unfortunately, he is relevant to our discussion) wrote at length about Austria-Hungary in his Mein Kampf. As much of a jerk (I can think of much worse to call him, but I shall avoid the colourful metaphors that might offend the Comrade Censors) as he was, he wasn't entirely wrong about that State. In fact, much of his analysis of the problems facing Austria-Hungary was accurate to a "T". His suggestions for solving those problems were horrifying, but the basic problems that he identified were accurate. The man was a crazy son-of-a-bitch, but he wasn't a fool.
Austria-Hungary was a multi-lingual, multi-ethnic, multi-religious, and lastly (and Hitler did NOT include this), multi-economic system State. The first three made the State hard enough to govern. I mean, it was a total mess from jump. As a citizen of Austria, Hitler saw that. Like I said, he may have been many things I don't like, but dumb wasn't one of them.
But one of the things he missed was that the country was multi-economic system. In the West, in Austria, the country was quite Capitalist, quite advanced, very much like its northern neighbour Germany, with whom it shared a common culture and language and peoplehood. The Eastern side was in many ways still VERY Feudalistic. This made the country even harder to govern than it already was. Aside from trying to govern a nation full of Germans and Slavs (who have NEVER really understood each other), then you throw in two economic structures, and man, you've got a total cluster!
So, I think that Marx was Eurocentric in a more narrow sense than even the question was asked. I think he was Eurocentric in a Western European sense. Granted, he did see toward the end of his life that things were picking up in Russia. A revolutionary tide was beginning to take hold in that nation. As to what form it would take at the time, I'm not sure anyone could say, not Marx, and not anyone else. But certainly the attempt on the Tsar's life was an indicator that not all was well within the Empire.
I don't know if that clears anything up, or makes it clear as mud.
Anyway, I look forward to the next reply.