Can we approach this question from another angle? As far was Wanny is concerned, what does he need to do to keep his job?
Make the playoffs? That would be an "improvement" over the last two seasons. Wanny could claim the team had taken a step forward at that point.
Jay can do enough for this team to get 10 wins, which odds are will be enough for a Wild-card spot. Is Wanny thinking that is the way to go? Conservative, but Wanny lives for that.
Feeley is a risk, he might win 11-12 games for us, OR, we might only get 8-9 wins and miss the postseason. With the wheels turning in Dave's mind, I really think he would rather go a pretty sure 10-6 than risk getting worse, even if it means giving up the chance to get better with Feeley.
Now, how much pressure can Rick bring to bear? After the contract Feeley got, and the #2 pick we traded, he will look a bit stupid if Feeley becomes just a back-up. I'm sorry, but a #2 pick is too high a price for a #2 QB. Especially with the contract AJ was given too.
Wayne H. seems to favor Feeley too, so that has to factor in. At the end of the day though, Wanny will do whatever he thinks it will take to save his job. Whether that is best for the team or not. I submit the Jets game at an example of Dave wanting to hit 10 wins despite having a chance to start some guys (Sage) and see what they could do in a real game. It would have been a good move for the future of the team, but not for Wanny, so he threw out all the stops to win.
The problem I see with starting Jay is that the team is no closer to a championship. Jay can get you about 10 wins, but you'll NEVER go far in the postseason. Jay's lack of talent really shows up against the better teams.
Sadly, Wanny will settle for "good" and not take a chance on being "great".