Even though Kosi was struggling at points the team was playing hard around him, particularly the defense. Kosi did reward the team's faith in him by being committed to the position or the team. I fault Richt for not properly reading the tea leaves and totally disregarding the enthusiasm of the team's effort behind Perry.
Let's also be clear Perry was a complete a$$. The signs were not good when he was suspended for the opener at LSU and released a video that raised a lot of questions about his judgment, maturity and extracurricular activities. Given UM's past troubles with the NCAA can you blame Richt for pulling in the reigns.
Much of Rosier's success was due to the fact UM had Berrios, AR, JT4, Walton, and Njokou during that 10 game win streak. What exposed Rosier was injuries and departures to UM's most productive players. Richt mistakenly believed Rosier was more responsible for the team's success than the talent around him.