After doing a little digging and thinking on my own, this is my train of thought:
If Purdue (with an arguably easier schedule for 2016) wins 3 or less games, it will be tough to sell that the issues that have led the program to this point don't simply lie with the head coach and the direction he is providing. Firing booth coordinators and another assistant coach along with losing 2-3 other coaches is a MAJOR staff shakeup. If things don't seem to improve in a large way this season, then what evidence suggests that they will get better in 2017 with a schedule that is seriously difficult.
2016:
Eastern Kentucky
Cincinnati
Nevada
@ Maryland
@ Illinois
Iowa
@ Nebraska
Penn State
@ Minnesota
Northwestern
Wisconsin
@ Indiana
2017:
Louisville
Ohio Bobcats
@ Missouri
Michigan (HC)
Minnesota
@ Wisconsin
@ Rutgers
Nebraska
Illinois
@ Northwestern
@ Iowa
Indiana
The problem looking at these two schedules side by side is that the easier schedule is clearly the 2016 schedule. If Hazell is fired after this season, what favor do you give the new head coach to get ahead in his first year? There is a damn good chance that in 2017 Purdue goes winless because the easiest game on that schedule is a tossup between Illinois and Ohio. Illinois will be in year 2ish of their head coach and Solich is a damn good coach at Ohio with an offense that puts up numbers.
Simply looking ahead to 2017 and seeing that it would be a disservice to a new head coach to be given that schedule as a program that is struggling to improve, I think Hazell will be given two years to show improvement which also gives him a recruiting cycle with the new football building in place as well. Frustrating to come to that conclusion, but if he can be allowed to retain his job and hire new coordinators after going 6-30 in his first three seasons, what harm comes if he goes 2-10 or 3-9 this season and then 1-11 or 0-12 in 2017?