Lest ye forget, another DA bungle: losing Aaron Glenn, Ryan Nielsen, and Kris Richard
Ryan Nielsen is really the only serious mishandling.
Payton obviously had big plans for Nielsen, and what he's done with the glue eating birds defense is nothing short of impressive considering he has notably less talent to work with than Allen has. Their defense has allowed less yards and points than the Saints.
Payton promoted Nielsen all the way to Assistant Head Coach and constantly had Loomis upping his pay to keep him here. Allen demotes him from Assistant Head Coach and won't let him call plays, no surprise he bolted first opportunity he got.