I don't disagree with you, but I'd like to make one small addendum that may go to explain why people might consider his music to feel overproduced. I believe that reason is his use of non-equal-temperament tuning.

For those unaccustomed to hearing pure intervals it can sound like a high-gloss "sheen" that gives an unreal quality to the music. In a way it becomes "too perfect" and unnatural to those who are used to hearing the equal temperament that most western music is recorded in. I hear it a lot in some acapella vocal groups and I often find the sound off-putting and it somehow feels a little corny to me.