Non primary english speaker here (probably not the first here, though): it's a clear, concise guide well fitted for anyone who has played the game a few hours: a very instructive reading, useful if you want to micromanage industry while waging economic wars and managing your pop in hope to minmax your industrial output. It could use a fancier display, but that's nickpicking.
Also, you may want to write about POP conversion to a primary or accepted culture: as you say, they are essential to optimize your national focus strategy (more accepted pop=more national focus point, to a limit), and I think there are countries which could benefit from an optimised conversion in this view, especially when the factor:
- Is not accepted culture
- Continent is North America or South America or Oceania
is not in effect. If I suggest this, it's mainly because I tend to play Vic 2 with converted saves from EU IV, where my countries tends to have many non accepted cultures cultures. In Vanilla, I guess it's less of a problem, altough an Austrian run (8.84M POP, primary south german:20,3%, no accepted culture) could benefit from it.
Overall, an excellent guide.