You see, that's where I disagree with you. The stats that you provide prove nothing relative to the "reality of McCarthy's level of effectiveness." I see McCarthy's name no where in the stat tables you provide. The tables compare team winning percentages; they say nothing about how or why those percentages are as they are. Stats do not conclude. YOU conclude based on the assumption YOU bring to the table, namely that Head Coaching strategy and game management is directly and solely responsible for the team winning percentages listed.
In fact, any number of factors could be responsible for the stats. Head Coaching strategy and game management is only one factor. Another might be a great offense and superior excellence in the QB position. Another might be overall excellence of players at all positions. Another might be consistently effective performance by the defense. In fact, one could just as easily conclude from the data that Dom Capers is as much responsible for the Packers' won/loss percentage in the stats as McCarthy.
Moreover, it is possible the Packers may have scored high in these won/loss results despite iffy Head Coaching offensive strategy and game management in the second half and 4th quarter. You cannot prove otherwise by reference alone to the statistics you provide.
The truth is that a coach is not simply a risk manager. Yes, each and every play in a football game carries "x" amount of risk of "bad things" happening (lost yards, fumbles, penalties, interceptions, etc.) which the coach must assess and consider based on his knowledge and experience. But each and every play also carries "y" amount of reward potential for "good things" happening (yards gained, field position, scoring position, 1st down gained, time off the clock, etc.) which the coach must assess and weigh against the risk.
How the coach chooses to weigh risk against reward potential tells us whether he is "conservative" or "aggressive," "old school" or "new school" or however we want to describe it. Stubby has proved time and time again that he is, generally speaking, old school conservative.