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I think you and the poster above are spot on about the insistence on a certain scheme but without the personnel to pull it off. Can't continue to call deep shots where the QB holds the ball for 4-5 secs while the route develops only to get crushed. Chances are they would have lost bradford at some point in this season if they didn't make the move.
If the o-coordinator doesn't want to adjust well then you have to remove him and go in the direction of someone with a different philosophy which is what looks to have happened.
Ah, so your angle is that he was asked to resign rather than upon his own volition. Could be.
I'm sure we'll find out at some point.