... if without the plagiarism problem, is the things he produced high quality?
The reason why I don't study graphic design or fine arts... XD I am too picky.

It does fit in what I learn about online plagiarism. If your university have strict policy, plagiarism should be a punishable act. My university take plagiarism seriously, and the punishment being kicking them out of school. But our university's courses are more to science or facts for business, there are no subjective art for us to debate on.