So, I have still this bug in my team in Die Hard Fan League, and because it's a waste of time to try to play, I am using the same gameplan than I do in the NFL League to compare the results, my offensive roster in the bugged team is better than the other (I think).
There is the difference I see in my bugged team :
My QB is always throwing to the HB and TEs (I also use my TE as FB), my QB threw 36 ***** to my HB, 30 to my TE, then only 19 for my first WR in the list.
So, can we consider that the lack of familiarity with the opponent defensive plays forces the QB to don't watch downfield and throw checkdowns only ?
Actually, my QB only completed 49.1% of his throws, have 4 TD and 10 INT after only 4 games, and a 43.87 rating.
I also have the feeling that he never see wide open targets or makes many more throws to double couverage than before, but I am not sure of it, maybe just a feeling because it's boring to watch...
In my team in NFL League, that have some plays (not as much as die hard league) with a negative familiarity but is still getting more familiarity games after games, my HB and WRs have more or less the same number of throw to them, my HB, FB and 3 WRs are between 24 and 21 targets.
So, I think the lack of familiarity with the defensive plays, doesn't allow the QB to have a correct read of the defense, I mean it's like he doesn't try and prefer to directly throw checkdowns.