I always thought...
(I'll use spoiler text but I can't imagine that anyone reading this isn't aware of who is coming back)
Spoiler:
...that was a pretty brutal exit for the Sarah character (having your head chopped off and stuffed in a box would be fair to happen to T-Bag but not to Sarah) so in the end, I guess I'm glad that they're 'fixing' that and having Sarah come back.
It'd be funny if they just went crazy and it was still her head in the box and they've just reattached it to her body. She could have stitches all the way around her throat.
