- East-asian students will have a hard time spotting typos even in important words as their own name
- Even on designs with the most extravagant typography choices for their native fonts, choices for roman fonts are not prioritized
- "Letter people" do the same thing the other way around ("OK, we got a nice asian feel to this poster ... now to add some cool chinese characters... done") It's exactly the same feeling for people used to seeing asian scripts, to see the basic printed version everywhere and the same old standard fonts.
Next time you make something using a foreign script, please keep in mind that how you're looking at it != how natives look at it!
For more on different traditional script styles see http://en.wikipedia.org/wiki/Chinese_script_styles
However, the best information on font choices for Ch, Jp and Kor is in the languages themselves, unfortunately.
edit: : https://en.wikipedia.org/wiki/Han_unification