Well this season seems to be going nowhere fast. It's the final year, and we're wasting time with storylines about Quinn's promotion, Masuka's daughter, and Dexter's new neighbor? Seriously?? You'd think this was the middle of the third season or something, with the complete lack of buildup and urgency we're seeing.
Actually, I wouldn't be surprised if all the storylines eventually merge. They are already starting to.
For example, Quinn may discover that Deb killed El Sapo, and then wrestle with the decision to turn her in. If he turns her in, he will get sergeant. If he doesn't, he loses out on sergeant and disappoints Angel/Jamie.
Masuka's daughter may actually be grifting Masuka, and Deb will find out in the course of her investigation. Maybe she's a serial killer, too. You really never know with this show. Even if she's not, I see nothing wrong with developing Masuka's character like this (especially since the series is coming to a close). Same with the neighbor that likes Dexter.