This was a great show for the first two seasons because it was about two women (and two men) and a crime being hidden... Like Breaking Bad (but not as great, of course) it was tethered to this plot-line for urgency and suspense...
But somewhere along the line they dropped the secrets, and Dead To Me became an internet-era version of Laverne and Shirley (despite the girls comparing themselves to The Facts of Life)... and that's not bad either because Linda C. And Christina Applegate share terrific chemistry...
Until this season, which is really a mash-up of dangling story-lines not important enough to cover when the show was at its peak, and, with the same super-quick sarcastic jabs, now at lightspeed, the characters are, ironically, slowed down in the process, discussing more than actually doing... this includes the female cop, who previously wasn't sarcastic or neurotic at all (which was needed)...
And what they wound up doing to one of the girls, making the last few episodes a cross between Thelma & Louise and Terms of Endearment, is a real shame, an easy out, a means to a melodramatic end.