Of course, Chiyo simply HAS to survive.
Because she will put the Ichibi back into Gaara, so that he regains his former strength and...actually, everything will be as before the beginning of the new arc ^^

Oh, and Deidara is for sure NOT dead.

He knew, that he couldnīt flee by himself, so he provoked Kakashi by coincidence, because Deidara also knew, that would be his last chance.

So, be prepared for "Return of Deidara", after the impressive "Return of Gaara" arc XD