He got 8th position(and the accompanying negative records) mainly because he stubbornly refused to change from his suicide 'donut' formation,where the midfield was nonexistent, throughout the season. Consequently, every team, from the Epl down to the likes of Newport and Coventry, were able to stroll through the midfield and pepper our goal with numerous shots. Everybody could see where the problem was, but in his mind this was entertaining. So the idea that he failed because of 'structure','transfer window' and all the other excuses being trotted out is not borne out by any facts and is complete balderdash. It is only when he did a reset on his poor tactics over the last few games that the performances and results noticeably improved.
This is why the club should not waste another season on this manager. The club indulged him over the last window and gave him most of what he wanted but the performances were dire, even with his poor purchases taken into account. His puzzling stubbornness and unwillingness to be pragmatic when there are injuries are serious red flags.The inability to make proper subs has led to loss of points in the last minutes of a number of games. Even looking at this FA cup run that has hoodwinked everybody, Coventry were very unlucky in the dying minutes of that semi.This points to a deficiency in tactical awareness which means he cannot take the club forward. A new structure needs a new manager so everybody starts on a fresh page.