I have had a hunch for a long time that the avoid fumble attribute is essentially meaningless, and does not actually do what it is intended to do. I decided to slog through some data to test that out this morning. While the scope of the analysis is pretty limited since the data is so tedious to gather, the results provide strong evidence towards confirmation of my hunch.
I looked at the 20 non-QB players with the most fumbles at the current point in the German NFL season. I recorded their avoid fumble attribute, and from their number of fumbles and total touches (carries + receptions + kick returns + punt returns) I calculated their fumble percentage. Ideally there would be a strong negative correlation between avoid fumble and fumble percentage.
What I found initially was an extremely weak POSITIVE correlation (meaning, from the data, you would expect a player with higher avoid fumble to fumble the ball MORE often). After throwing out the two most absolutely egregious outliers (94 and 100 avoid fumble with ridiculous 14.3% and 11.8% fumble percentages, respectively), there was an extremely weak negative correlation with R^2=0.167.
I do not think that avoid fumble is the only attribute that has a very loose (if any) connection to actual performance. I would really like to see an effort to make the results of each game more reflective of the quantified talents of the players involved. I'm sick of coming into a game where I've got Julio Jones in his prime being covered by Joe Biden in his current state (I think he's still alive), and Julio comes out of the day catching 2 of 7 for 11 yards and a drop.