I'm definitely not claiming that Korean is a more "optimized" language overall, but at least when it comes to the writing system, we had exactly the same problem as the Japanese (if you look at Korean newspapers just a few decades ago they are littered with Chinese characters), and at some point we fully ditched Chinese characters and have no problem going on with our lives. In fact, it made our lives easier in many cases, especially in keyboard typing.
As a side note, we obviously have some side effects from switching to entirely phonetic alphabet system. For example, the words "tea" and "car" have the same pronunciation (차=cha) and so they are indistinguishable in writing, but it wasn't the case when Chinese characters were used (茶/車). I'm not sure how this side effect propagates into some sort of sociolinguistic phenomenon, but at least for average people it doesn't seem to have much significance.
https://www.youtube.com/playlist?list=PL023BCE5134243987
Very engaging lecture. Some parts are surprisingly relevant to this day.