I think the actors are fine, they are just given CRAP to work with. I mean, "You poisoned them agains the governer", really? I actually LOL'ed at that one. They need to figure out how to write for women on this show, nearly all of them are terrible. They have managed to take an awesome character like Michonne and reduce her to a glowering doofus.
That is the biggest issue I have so far with the writing. SO MUCH of this show's conflicts could be solved if people had actual, normal, and realistic conversations. Why the hell does everyone have the need to keep thier mouths shut, even in instances where it is in thier best interest to explain?