The Athletic just released a podcast where some of the voters came on to discuss this list. Listened to in on my commute home. Few interesting points.
Link to Podcast
They all agree Draisaitl not being on the list was a big omission/mistake on their part.
One voter, Shayna Goldman, had Orr ranked #8. Lidstrom was her highest ranked dman. She cited a short career and a easy level of competition for ranking him at 8. This likely swung Lemieux into 2nd place.
One voter, Dom Loosechicken had Messier ranked #30. Citing an easier scoring environment boosting his numbers.
James Mirtle ranked Matthews #52, lowest among all voters.
All ballots will be released on their website soon.