I say definately give the guy his chance, 2 years to turn around what he inheritated is ridiculous. We're heading in the right direction. I say give Denny his 4 drafts, and 4 Free Agencies to get our collected butts in gear, we'll be much more talented than before he got here.
That said, the only guy available who I'd want to replace him with at the moment would be Gary Kubiak. Studying under Shanahan, offensive genius' I'm down with that and I think this is his last year as an assistant. Sean Payton could be a good one, but I'm not sold on him at all, but curious to see what he'll do when given the chance.