So three characters have been 'upped' to series regulars for The Walking Dead: Tyreese, Sasha, and Beth. Happy about Tyreese and his missus as I can see he and Rick being a good team. Not so sure about Beth. Apart from attempting to kill herself and then spending much of Season 2 in bed, she's done virtually nothing in Season 3. I would have promoted Carol and explored her relationship with Daryl more... There's clear chemistry there.
Apparently The Governor will be a regular in Season 4 too... I like him a lot, he's one of the best things to come out of Season 3 along with Michonne. I have to say I hope he's written a little more like the insane/evil Governor from the comics rather than a bit unhinged. Gunning down his own people was shocking and perhaps a glimpse of what's to come from him.