I kinda like the first few episodes of the second half of this season, that latest one was really disappointing however.
Just more "Oh man doesn't Jerry suck everyone? Look at how much Jerry sucks. Oh look at him, he's gonna go and really muck things up again because he's so incompetent and pathetic."
Just more of their tired, lolsowacky dysfunctional family dynamics and, as you pointed out, no further progression of any sort of main plot line.