Now, I have never been a fan of Dolphin, particularly as she was portrayed in the Titans comic, but killing Cerdian?
(Oh, and DC? Have you figured out what gender Cerdian was yet? He was male at first, then female during Infinite Crisis... did Superboy punch time so hard Cerdian's Y chromosome fell off?)
However, the one thing I will say that's a potential benefit here? I keep hoping they bring Tula back in Blackest Night. That would be awesome.