I could probably live with Manning for another year, but only if the coaching staff is cleaned out.
Honestly, John Fox and his cronies are sitting ducks when a good coaching staff has a blueprint to follow. For instance, the Colts followed Seattle's blueprint from the Super Bowl. Their D-backs were physical with the outside receivers, and they clogged the middle of the field, making it really difficult for Manning to find anyone. Fox and Gase had no answer for this, just like in the Super Bowl. They only know how to coach one way, and that way is extremely predictable and easy to counter if the defensive backs are good enough. They didn't move to crossing routes, slants, comebacks, ect., they just stuck with screens and fade routes. Hell, they didn't even try a trick play. With the way things were going, they should've got creative and pulled out some different plays. Unfortunately, that just isn't their style, which is why they need to go.
As for Del Rio, it's funny how Elway brought in Talib, Ware, and Ford to mirror Seattle's defense, but it was the Colts that were able to pull it off. Seattle's defense plays with the mentality that THEY are going to be the deciding force in winning the game. Doesn't matter what Russell Wilson does, they are going to make plays and keep the score close. Our defense decided it would make a few stops, but ultimately, it would be on Manning to win the game. We're at home, the crowd is going wild, and we casually just let Luck do anything he wants. No need to cover, we'll just play ten yards off the receiver and let Luck pick us apart. We'll get no pressure from our two "star" pass rushers. Instead of taking it upon themselves to win the game, they just became as demoralized as Manning did, even giving up 3rd and 16 in a key situation like it was nothing. Del Rio is just a incompetent as Fox and Gase, so needs to go as well.