I liked the warp core. Thing I liked about it the most was that it was a real facility with some set dressing. Watched a few science/physics documentaries where they interview scientists that work there and the place looks great. They didn't do much to it at all in the movie except add some consoles here and there.
But I agree with starbase on the Return of the Jedi bit. That bit of it was right outta Jedi.
"Death, delicious strawberry flavored death!"