On another board, it was postulated that they got rid of the villain in possibly the worst way possible. Sending him further back in time will only lead to bigger and worse time screw ups. Maybe he'll return. I sure hope the writers don't think that was a good ending for him.
Yaz is still bland, but likable, I guess. Ryan got better, imo, as did Graham.
I think the plot got kind of cheesy with the politics at times, especially that ending.