Walt is still trying to fight for his family, but you're right, his morals have taken a nose dive. It seems like now he just wants to take a machine gun to everyone who's his enemy. He has money now but doesn't want his family to die.
Jesse is only acting out because of the pain that killing another a man gave him...I think. I think he wants out but has no where to go and no one to turn to. He needs a friend. I'm guessin he goes off the deep end before this season is up.
Skylar and her sister has always sucked, whether they are good or bad. They do need to give Walt Jr. some lines or side story. It's hard to even cheer for Hank, who is a blatant butthole 24/7 to only his wife.
I don't think the story is getting any worse, but I do find I'm looking for something to be happy about.
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People do not care how much you know until they know how much you care.