If you extend the cutoff for that draft article by one year (2001 draft), it really changes the story for the Cubs. That was the year Prior (15.8 WAR), Soto (11.7 WAR), and Theriot (9 WAR) were all drafted. That would triple their score and put them somewhere in the middle of the pack.
They wouldn't get credit for them since they were traded, but Ricky Nolasco (15.4 WAR), Sergio Mitre (3.1 WAR), and Brendan Harris (2.5 WAR) were also drafted that year. The 2001 draft was really good for the Cubs.