There are three doors, and the Eagles will walk through one of them this season. You don't need Monty Hall to tell you that not all doors are created equal, but that is the nature of a boom-or-bust season so reliant on things that are still uncertain.
Chip Kelly remade a large portion of the roster after deciding the 2014 team "wasn't close" to good enough to compete for a championship. In doing so, he removed almost all of the last vestiges of Good King Andy (and Howie Roseman, to some extent) and put the onus of winning and losing even more squarely on his shoulders.