SPOILERS:
Agreed. I don't really think Carol is dead. I just don't see them doing her death so nonchalantly after the big deal made with the others. They just showed her as being "missing" at the end. I think that was just to mount tension. Maybe Carol will end up serving as a bridge between Rick's group and the Governor's group or something, who knows...? But I'm pretty sure she's not dead.

Do you remember the end of episode, 2 I think? Where Carol cut open that walker and was being watched? Who knows, she could have been taken by them who was watching her, that's what I think anyway

SPOILER

Last time I looked Carol wasn't listed as main character, instead returning. Personally I don't think her character has anywhere to go, but I rather see her die a bit more epicly for one and two they need to bring in a replacement first.

She isn't dead, I don't see why they failed at that so badly. Her scarf was still on her head when she ran out the door....

The third hole could be for the other prisoner (idiot Andrew) Because even is she is dead, she disappeared, so why dig a hole for someone you can't even find?