I don't think shes getting much work beyond TWD. They have to pay the bills somehow so until they start getting noticed and cast in other stuff I suspect they'll be here for the long haul or until the writers think its time to cull the herd.
You're right. Poor Emily Kinney. Though I've heard last night on the Talking Dead that she's got a new single coming out pretty soon, so that's a good thing I guess.
But I just got the feeling that the writers are gonna get rid of a strong character next season (whether they're getting work elsewhere or not), and Michonne or Carol both feel like the "safest" bet.
Rick, Carl, Darryl and Glenn are like always in a life-threatening situation but somehow they always survive, so I really don't see them going anywhere anytime soon.