What defeated the 'emperor' Napoleon was not so much individuals such as Nelson, no matter how great their personal contribution, but the systems which supported the war machines.
Napoleons autocratic regime introduced numerous bureaucratic innovations and attempted creating a centralised, standardised Europe (sound familiar? e.g. Rome, Hitler & EU). But he failed to appreciate the greatest advance in Britain, i.e. a true free market economy supported by an international system of finance (sound familiar? e.g. Rome, Hitler & EU, OK not so much Rome, they did have quite advanced financial institutions). Napoleon famously accused Britain of being a nation of shopkeepers, he had failed to appreciate the importance of a robust trading economy in supporting protracted military operations. Napoleon's brilliance on the battlefield was not matched by a broader economic vision for Europe. It was therefore no surprise when he later declared himself Emperor. This just illustrated the old fashioned reactionary instincts were still at work in the heart of Europe. Contrast this against Washington refusing to be crowned king of the US!
I wonder if and how CA will implement some way of replicating the effects of different economic/government systems, e.g. more democratic states have greater wealth but are more liable to change tack with a change of government (reflecting the changing will of the people)
Also what comes next for CA total war series? , how about the 19th century 'the great game', this is well trodden ground by other developers. It would need greater non-war features to model economics, politics, industrialisation etc so might get bogged down. At this rate there might be few historical periods left, MTWIII anyone?