Bogey's gotten worse and worse on defense over the years. I'm not sure a manager could do anything about that, and maybe JF has tried. I'm not really holding JF responsible for 9 out 10 of our returning players doing worse or much worse than last year, but I suppose he might be partially to blame.
To me, wins and losses do matter when evaluating a manager's skill, but it's not the only thing. I do think JF has, and I've given him credit for this, gotten the most out of the pen anyone could expect. I have no issues with how he handles the rotation or the staff as a whole. I rarely criticize his in-game decisions like many do, but to me, JF's ture value is that he's a great pitching coach trying to manage a whole team.
He has not gotten the most out of his everyday players, he has not stressed the fundamentals of defense and base running- maybe because he doesn't even know them himself. After all, he barely knows the actual rules of the game. Yes, we lost Papi, but he was never known for defense or base running skills, yet we got worse in many areas of defense and running fundamentals after Papi left.
I'm fine, if you don't think those negative aspects of JF's portfolio isn't enough to want him gone, but to me, you seem to not even think those issues exist, and if they do, it's not JF's fault in any way, because we are in first place.
Just for argument's sake, do you think it's possible that a manager can turn a 95 to 100 win team into a 90 win team? If yes, do you think that manager should be brought back year after year just because the team keeps winning despite his negative influence?
I realize it's hard to quantify "negative influence" and what the net value is for a manager other than wins and losses, but that doesn't mean he can't have a negative influence despite the team winning and winning- not that the Sox have been doing that every year under JF's watch.