First things first the makers have botched up this season. The winding up of Rooster's character came out a bit preposterous. The characters of the NewGuy and Mary are hanging in the storyline and seem to be coerced into the plot. And the major show down being the last few minutes of the season finale where we see the end of a marriage that seemed to have lasted for like a few minutes on grounds that were not even justified.
It would've been great to have ended the season on a positive note.
P.S - When the family is as dysfunctional as the Bennett's swearing is just their thing.
(To add a realistic touch most probably)