Have you ever seen type in print that you find difficult to read because some of the characters are so stylized that they're difficult to make out? That'd be my concern as a non-Korean speaking/reading person developing a typeface. I believe that Hangul is an alphabetic system, but that the parts of a character block are somehow grouped according to syllabic units. I'd be very wary of developing a typeface for such a system because I'd be more likely to design a typeface that doesn't present the necessary information in a readable way.