As much as I LOVE the Goblins from 616, I'm almost glad they didn't try for a traditional Goblin look for Harry.
Why?
Because after Harry's father had the technological Goblin suit which the fans hated-oh-so-much, logically, he wouldn't settle for some crappy rubber mask. He'd either take something as good as what his father used, or better. But because there was such a negative fan response from the first movie, they steered away from the design of the first Goblin costume, and went with something more realistic. From what we see, Harry isn't insane (yet), he's just out for revenge. He has apparent anger toward the Goblin, and his father, and wouldn't embrace that without some sort of severe chemical motivation (the chemicals his father used, perhaps) but it seems as if he hasn't taken any yet. So if I was out for revenge, I'd take advantage of the Goblin's technology too, but Harry's suit seems to be more streamlined and practical for what he wants - revenge, and to kill Spider-man.
I've seen Green Goblin's Last Stand. Great fanfilm, good acting on the Goblin's part, but honestly, watching him caper around in the Goblin mask makes you realize how uneffective that would be on screen. I mean, okay, I CAN see it being done, go to Deviantart and search for "Green Goblin 2" and you'll see an unbelievably good suit design, BUT that would be out of character, once again. And there's no reverting now. Either he resembles the Goblin his father was, or nothing - he has no motivation to be a rubbergoblin.