If you go into big men, Korea is one of those countries where the local scene is so small that the good fighters are facing each other, and you can be good and end up with a 6-7 record (a little bit like WMMA). That's why 7-1 at MW is quite good there
Now, let's reverse the role. You are saying the UFC matchmakers are matching bums in DWCS. Now, could you pick us a Western European MW and an East Asian MW who would fight in the DWCS and are way better than Hwang and McCorry? Regarding Western Europe, Augen being injured, Currie cannot get a visa, Belandi being a decision machine, I don't think you can get better than McCorry, Bouafia, and Mario the Italian with an Albanian name. I don't know the East Asian scene, but 7-1 at Road FC seems quite good