I think it's done. If there was going to be a sudden turnover in the results, it would have happened before the end of the show. I think they're going to shift focus on to Nick, and Phyllis is going to start pursuing Jack. (Poor Sharon, can't keep her husbands away from Phyllis. ) I imagine Nick's return will dovetail with Phyllis getting back with Jack.
As for the Kevin/Janna storyline, I think that Detective Maggie is too busy flirting with Paul to solve any mysteries.