Pat Hobbs has a tough assignment, given the departure of a reasonable number of season ticket holders and their donations.
That said, the letter seemed to focus on what he had done with funding facilities and not setting reach goals for Coach Ash.
In the corporate world, successful leaders set high reaching goals. If you fall a bit short, then you are still doing fine and need to set the next tier of goals to move forward even higher.
Pat needs to publicly set a lofty goal for Coach Ash...say find a way to get 7 wins next year...and settle for 6 wins for bowl eligible.
You can see from lesser college football programs that are successful with smaller players, the head coach is obviously creating offensive/defensive game plans that fit their situation to beat bigger/better teams....see teams like UCF.
The job of any coach is to recruit, teach, and coach the players to play their best in each and every game, regardless of the facilities and their 1-5 Star status. All football fields are the same dimensions.
Bottom line for an AD is to set high success goals for the Head Coach and the Head Coach needs to deliver results or be replaced.