I think the modified versions look worse in every case, and I question the author's sanity. You can only appreciate Van Gogh if you can make his color choices

I think the modified versions look worse in every case, and I question the author's sanity. You can only appreciate Van Gogh if you can make his color choices more "normal"? So you'd only appreciate Picasso if you could use photoshop to reconstruct his paintings? Take the work as it is. Attempt to understand it on its own terms. That is how you grow as a person.