I don't understand your first paragraph, so I'll leave it alone.
Now, if you think for one minute that Edwards, who I truly believe has a bright future, is going to outplay Favre this year, you're mistaken. I get the "when it's over, it happens quick" argument, but BF played his best football last year. We need a QB who can go toe-to toe with Manning and Brady. Favre is that guy.
He doesn't make sense for all teams. He does for the Bills because we are that close.