Re: On Jonah as Mayor of NYC:
Actually, I can sort of see this working, but in terms of Jonah having one of his "Hey, Spider-man isn't all that bad after all" fits. I'd like to see him start off getting on Spidey's case, but get pressure from (way) above to fuck around with the guy even more, beyond what Jonah's willing to do, and ending up sticking up for him on the basis of being against a greater threat.
Like you say, J.J.J. has a minimum standard of decency - let's see him actually using that decency to protect Spidey, because the guy may be a menace but some people are worse.