The governer will be in for a surprise if he goes to attack Ricks bunch again, all his old towns people pulling guns on him.
I think that the Zombies have been getting a bit smarter in a way. A few things they have done have made me think that there is a possiblity the next season could be tougher for the group with zombies finding ways in. I don't mean they will be challanging Rick to a game of chess type smart, just better at getting their dinner.
Carl might be crazy this season, Rick looks to be sane again and has two kick-ass people backing him up in Michone and Daryl(the king).