I won't necessarily say you're wrong (we're talking about paths not taken, stories not written), but one quick counterpoint would be to be point out that maybe a replacement goblin (especially the first replacement) shouldn't unfold just like Norman/Green Goblin. I loved the Hobgoblin mystery part myself, and lots of people love mysteries. Once the reveal happens (and possibly Peter doesn't learn before the reader), then there's an eternity (for a fictional character) to possibly delve into the double life stuff and what not.