Quote Originally Posted by Michael Watkins View Post
why is spider-powered Norman considered to be more of a threat than goblin-serum-cult-augmented Norman?
Because the goblin serum, while giving him super strength, made him batshit insane. One of the points made when he was cured was that he was a bigger threat due to actually being sane.

Spider-Norman has the ruthlessness of Norman Osborn and the powers of Spider-Man without the insanity of the Green Goblin.