Buffalo Rumblings does periodic polls of its readers on the GM and the HC. The OP should just take responsibility to post a new poll on the first of every month asking TBDers to provide their opinion of the state of the team, on a scale of 1 to 5. Make it clear in the wording that the poll is measuring confidence in the direction of the team moving forward, rather than about the ability of the team to win the Super Bowl at this point in time.
During the season, post the poll midweek or later to eliminate some of the highs and lows that come from the all too rare exhilaration of victory, or that other feeling.
Post a line graph or box and whisker (like a stock ticker chart) plot of the results over time in each poll question.
Above all, keep the question simple.
Done!
kj