So as much as I like S5 so far, and I really like it that they picked up the pace of the show, I can't help but feel that the characters could still be stronger. With some of them, you can go 2 episodes without one of the "main" characters really saying a lot or doing anything, they're just kinda there in the background, and you might see them kill a zombie, but they don't really do anything apart from that. Frankly I think the main group is too big. You have too many people to focus on, and you can't flesh out character depth as easily with so many characters. I think a good example someone pointed out was the weird fact that Maggie hasn't really shown any concern for her sister Beth, neither in terms of sorrow (thinking she is dead) or action (wanting to go find her). If the group had 5-6 people less, this is one of those moments when they could have really explored that. And even if they set it up in the next episode, it would still come out of nowhere. It wouldn't surprise me if they try to give Maggie a scene like that in the next episode, so that we will remember Beth is still out there, but it would still come out of nowhere, and feel really weird, considering she hasn't shown those kind of emotions before.
Like I said, I like the season so far and they have stepped it up. But the characters themselves remain a weakness. But on the other hand I don't think 90% of the audience for the show really cares. Just look at the fan favorites and how shallow their traits are, basically any character who kicks ass, blows things up and kills zombies will be a fan favorite. Darryl, Michonne, Carol, or most recently, the new Rick.