I'm afraid a variety is too much to ask for in a country that can't even get "basic" cuisines like Chinese and Italian right.
Case in point: those weird pie-like creatures w/ sweet potato puree that Koreans call "pizza". Or the fact that Costco is considered a respectable dining establishment. Don't even get me started on Chinese food in Korea, lol.
Korea will never become a food destination like its neighbors Japan, China, etc until Koreans realize most of the non-Korean food they've eaten so far has been crap.