As I mentioned in the comments of this article, From my discussion with fellow Steemers, I can think of two solutions:
1- Make curation hierarchical. Expert reviewers should be presented with a filtered selection of good content. They should not waste their time searching for the needle in the haystack.
2- The system should be smart. It should learn what are the things that I am interested in and suggest those to me first.

Do you have any other suggestion?