I think it goes beyond the Chicago Tribune no longer being the title sponsor of what's now called "SportsTalk Live" on Comcast SportsNet Chicago.
For starters, do you really want to keep seeing guys such as Trib baseball writer Phil Rogers, along with others that don't bring much to the table as far as actual opinions regarding the sports news of the day that's discussed? Also, because CSNC is now part of the NBC Sports Group, I've gotta think there are more diversified guests that they want to talk to beyond the local athletes, sportswriters & other media personalities that appear with host David Kaplan. I think that explains in large part why NBC's Dan Patrick, Michelle Beadle & Chris Mannix, also with Sports Illustrated, have all appeared since the show was rebranded as "SportsTalk Live".
Unfortunately, it still doesn't explain why Frankie O from Harry Caray's Restaurant continues to appear every week as a weekly panelist either.