Even with that said, go back and look at DT's production in his last 5 games and compare that to what he is averaging now with Manning. Newsflash for you, it's not that different.
The defense wasn't stacked at all. If you go look now, you'll see that 9 of the starters on D this year WEREN'T starters last year. That's a 75% turnover at the starting slots. Add to this a change in defensive scheme, coupled with JDR taking over as DC.
Oline, yeah, they were great last year in run blocking. Pass Pro ? Meh, not so good (and yes, some of that had to do with Tebow holding onto the ball for too long.)
As for Elway and Manning, there are 20+ starting QBs in the league who would have found themselves out the door if Manning had come to their team. So, is that supposed to bother me or something ?