The adversaries this season (Petrov and Dunbar) were way stronger and more interesting. Solid performances, they convincingly stand up to Frank, and they don't come off as incompetent dumbfucks who just happened to stand in Frank's way. In terms of storylines, I liked what they did with Doug and his brother, although I'm not really a fan of the character himself. It was nice to see him having to reflect on how he has no family or purpose outside of his commitment to Frank, but aside from that there wasn't really anything there.
Jackie's story was pretty awful, but then again she's kind of a wishy-washy awful person anyway so whatever. Remy felt totally wasted, Seth hasn't really developed beyond "hot guy gunning for a bigger gig", and what the FUCK happened with Mendoza? Lol. Did the actor just drop out of the show half-way while they were filming for no reason? Super weird.
I found myself really taken by the Claire storyline though. I've been a pretty big fan of the character arc since the first season, especially with all the Lady Macbeth allusions, and I love that the show has allowed her to continually become a huge wildcard. The ending was bullshit though. If they wanted to pull that, they should pull it with some sort of closure for the season, not drop it off like that. Meh. Definitely looking forward to how it develops next season.
Gavin and Rachael are the worst things about this entire season. I feel the Rachael plot in particular is a complete waste of time because there was really only one way it could end. Regardless of whether Doug lets her go or if he kills her, she won't have any place in the show. Why waste all that time on building intrigue and suspense on her fate? They should really have just actually had her die off screen like it seemed. Doesn't help that the entire plot was tied to Gavin, who is a garbage-tier character carried over from the worst subplot last season. Should have dropped this entire thing and given more time on the season to develop Remy and Seth more.