Yes. He absolutely should have, a return of Spider-Carnage mini would have been awesome!
Although thinking about it, would the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of the clone of Ben Reilly (a clone) still have the codex or would that only reside in the original body?