I was interested to find Ady had given the idea of two Death Stars in the battle some thought, the second being the bare bones one from ROTS.
I love that idea, it really does give viewers of a special edition a WTF moment with Luke finding himself somewhere he (and the viewer) didn't expect to be.
And being so incomplete it would be much more plausible to imagine it being destroyed by a huge capital ship like the Executor destroying it by ramming into the thing.