I'm not sure what you mean about "retool" the offense in 2 years. We have some awesome young WR's, some nice young OLmen. Why don't you just say, we'll have to get another QB in 2 years. Well, I think that's the whole idea of grooming Brock is it not? He's got a 3 year window to learn behind Peyton (this year and 2 more, IMO).
I completely disagree with you that the entire offense needs to be retooled when Manning retires.