You as a coach are limited by the players you signed and the ways you have developed those players. Your successor has the same limitations, perhaps until he has signed at least one full class that is his and has had 2 Springs to re-develop players.
That is essential to accept, because it means that there is no quick solution once a staff gets off track either in recruiting or in developing players. The understanding of that is, I think, the foundation of the stubbornness of coaches like Fedora to make even small adjustments: they know that their players make the mistakes they make, are limited as they are limited, precisely because they were signed and trained to be what they are - except with more success. So a Fedora assumes that if only he can sign the magic QB for his vision of offense, it will be great.
Those who find the dream vision of a coach appealing, who want him or it to succeed, will tend to dismiss the overall failings of the program as something that coach can fix easily with 1 signing. The rest of the fans focus on the overall failings and assume that a change must be made precisely because there is no tinkering that can be done to effect much improvement from the players on hand who have been developed as they have been. For those players to do things differently with more than a bare minimum of extra success, they must be coached differently - not just a different play caller on offense, but different coaching from the end of a season to arrange for a new season that will not be like the last.