The script Raimi and Co. Came up with was a far cry of what was on screen. You do know that in a lot of these films, the studio demands rewrites and has ghost writers come in and change things up? They go uncredited. Example: Batman Returns went through about 4 drafts and revisions. Writers like Sam Hamm and Daniel Waters who did their respective screen plays had most of their hard work scrapped when WB got an uncredited writer to go to town on their work. The final credits list Hamm and Waters and yet, NONE of Hamm's ideas survived.
So with this, I doubt the blame could shift to Raimi. The was no venom, or Harry amnesia and there sure as hell wouldn't have been emo Parker with a dance number in August of 2004.
That didn't come to fruition, so who knows.