The Rivera's contract was up and Lovie Smith didnt want him back. It was his decision to go with Babich, someone who has coached with Lovie in the Tampa 2 scheme since Lovie was in Tampa. Lovie Smith is the defensive guru in Chicago and if the rest of the league didnt already know this then why hasnt Rivera gotten a HC job after interviewing with more than 8 organizations over the last two years.
With the Briggs situation, you don't seem to be acknowledging that Briggs was offered a long term contract that would have made him(at the time) the 2nd highest paid player on our team. He wanted to be paid higher than Urlacher and that wasnt going to happen because the Bears believe it or not value the former DPOY more than Briggs. He has the long term deal or the franchise tender to choose from. If he doesnt like his choices he should complain to the player's union.