If Coyle stays the only logical argument I can see him having is that the personnel was awful. That doesn't excuse him stunting his entire line out of the play. Although after watching this team have one on ones (Odrick, Vernon, Mitchell, Jordan) and unable to win them consistently, I see why a small percentage of the time he should stunt. Not all the time though.
His personnel is awful. His DTs don't eat up double teams. His ends outside of Wake can't win a one vs one. Vernon is the most overrated player on the roster. His mike has some of the worst read and shoot skills I have seen. Terrible at diagnosing at late to every play. Jenkins takes on blocks but has no one there to clean up. Wheeler shoots gaps aimlessly and has terrible IQ.
His corners are small and not skilled enough to play aggressive bump and run. His slot, Jimmy Wilson, has some of the worst hips I have seen and has 2-3 dumb penalties per game.
Still think he should get fired. His blitzes are terrible, bland, and easy to counter.