My other thought is this. If Trestman is a QB genius, then Cutler should be able to elevate his play beyond anything we have seen in past years. He will have the talent around him to accomplish it. If he continues to make mistakes that holds the team back going forward, then I believe McCown, or any number of other QB could accomplish an 8-8 to 10-6 season with this team.
When you factor in Cutlers durability, what are you really getting for your money. His time in Chicago has already proved that you need a quality backup if you hope to make it through the season.
What's the alternative? Do you think know putting McCown back out there and trying to draft the next great qb is a better alternative? Impossible to predict which qbs will be even a top 20 guy for the long haul. What if they put McCown back out there and we miss on the next pick? Another 5 years down the drain. Do you think McCown has what it takes to take them to a championship? How many years would it take his replacement to get to that level? It's a lot of years to wait on something that may not happen.
I get what you are saying. Can I say with certainty that McCown would lead the Bears to a championship? No. But, I can't say that Cutler will either.
I will agree that Cutler is marginally better than McCown in certain areas, like arm strength. But, I could also make the argument that McCown is better in certain areas, like game management.
To answer your question of finding the next great QB, this is where I refer to Trestman. If he is a QB guru, then he should be able to squeeze more out of QB's than most other head coaches. Few would argue that McCown showed more this season than he has with other teams. This leads me to think that Cutler should be lighting things up and should be in the top 8 of QB's. But, he hasn't so far. When comparing McCown and Cutler, it looks like McCown has made a larger improvement under Trestman.
Look around the league. For every Gabbert and Ponder, there is a Kaep, Wilson, Luck, RG3, Foles, and possibly even Glennon. We don't know what's going to happen with some of those guys, but under a QB whisperer like Trestman, you would think they could excel. There are a lot of young QB's coming out this year and next. At the very least, they could match the strong arm, poor decisions of Cutler.
With all this said, I have no choice but to trust that Trestman and Emery are signing Cutler because they believe they can improve Cutler's game over any other option available. If they believe his current level of play is good enough to win a championship, then I have my doubts. I will withhold judgement until after the 2014 season. But, the GM and HC have been wrong on other players, so, I'm skeptical on this one.