I watched Season 3 over the last week, and I actually enjoyed it as campy as it was.
I had stopped watching after Season 2 way back when, and I had noticed "Mistresses" was on the streaming service I joined, but I never bothered to catch up. But the series is leaving the streaming service at the end of this month, so I decided it's now or never.
The main characters are seriously all lacking intelligence half of the time, so it was fun to visit this thread to read everyone's reactions after each episode. It has been so long that I couldn't remember the plotlines from Season 2 very well, and maybe because of that, I didn't miss Savi at all.
Calista (and her friendship with Joss) grew on me, so I felt a bit bad for her at the end, though she really screwed Joss over. The police detectives on this show are just horrible. Joss' decision to visit Calista's house at the end to investigate was idiotic, and I didn't feel that satisfied by how this murder mystery ended. I was reading this interview about how they cut scenes because they didn't want to make the murderer too obvious, but we hardly even knew Wilson the Assistant, so that really reduced any impact of their reveal. I thought it was weird how much screentime they gave the lawyer guy, and the whole bit about Harry being suspicious of him went nowhere, so I wonder if they had planned something else but changed their minds.
I mostly started watching this show because I liked Yujin Kim from "Lost". Her storyline this season was pretty bad. I thought Vivian was creepy and Alec was so stoic that he had zero chemistry. But I guess I still enjoyed watching Karen and her friendship with April and Joss. She has good comedic chops that she rarely got to display on "Lost" (heck, she hardly got to do anything on "Lost" in the last season and a half).
The worst part of April's storyline was that bratty daughter Lucy. Marc grew on me too. He did have a boyish charm about him and his earnestness was cute, but he really seemed like a little brother to April. It was interesting they tried to bring Harry more into the fold by making him become friends with Marc. Though it was a bit icky how Harry let Marc have a one-night stand in his bed and he wanted to know the details. I didn't feel much chemistry between Harry and Ari the agent. Her hairstyle reminded me of the woman in the TV show "Providence". I never watched it but her frizzy hair was quite distinctive in all the TV commercials.
Anyway, I'll watch Season 4 soon. I ended up watching 2-3 episodes of Season 3 at a time.