To answer the OP:
"Do you think GM missed the ball my making the z/28 a track only car?"
No. The Z28 is the real thing. There are other performance Camaros with plenty of gingerbread.
While the Z28 is not for me, (I can only afford one car) I am glad Chevy built it. It tells me real gear heads are in charge and will be building us cars that are exciting. I can remember much darker days at GM.