My summary of the neat graphic that they do at the bottom of the article:

• 3 teams (Lions, Argonauts, and Blue Bombers) have jockeyed for the top 3 spots so far. The last month or so it’s been the Argonauts and Blue Bombers fighting for the top 2, as the Lions have cooled off a bit
• The Allouettes have surged from last place at the start of the season to comfortably occupying 4th for the last month
• The Redblacks were ranked low at the start of the year, came on strong in July, but have fallen towards the back of the pack. Can they Crumback?
• The Roughriders and Stampeders have been hovering around the 4th and 7th spots most of the year
• After holding onto the last spot for most of the season, the Elks have ascended up to the 6th spot
• The Tiger-Cats had a decent start but have more or less been in the 8th spot for 2 months