Hey guys, I think Korea is a really bad civ currently.
It seems directly outclasses by Arabia. The science from historic events that Arabia gets is just a way better source than Korea's is, and he earns culture. The great person points are pretty even, I'd even say it favors Arabia because you aren't dependent on golden ages. I guess the H'wacha is marginally better than camels?
You can compare him to Portugal. Even if Portugal does not build either Petra or Colossus, she earns more science per turn from her trade routes than Korea will. To match her in medieval you need to work 30 specialists. She also gets an even amount of gold.
With specialists eating 3 food to start, even with +1 science specialists aren't very good early game. The strength of early science would be that you can delay building libraries or universities, except you need them in order to have specialists to work. And your unique building is a university. I find if you go tradition, your secondary cities are still working on arenas when you unlock the Seowon, the science just isn't very useful. It also makes you unhappy. His toolkit screams rationalism, but you cannot build anything in a reasonable amount of time if you take that policy tree.
Late game your science is crazy, I'll give him that. But I don't really see the point because you cannot build anything. I recall having artillery before anyone else, but it took 9 turns for my cities to build one and I still had not finished military academies or even began on stock exchanges.