Can't wait for the 2nd half of the season ...... can't wait how the dilemma that the Dixon brothers face, will pan out.
It's possible that Merle finally goes to the good-side - which would make for one more decent fighter for the Prison's defense ....... there's also the possibility that the Guv'nor will use Merle as a spy to infiltrate the Prison from the inside.
Easily, the addition of the Dixon brothers was the best thing that the writers added for the TV series.
Also, the entry of Tyrees finally gives the show a legit afro-american lead - a great big help to Rick as well (following the comics storylines).