@frogdog: Peter seriously needed to grow-up, and the body swap was Marvel's way of doing it. They weren't tired of Peter Parker. Just the stupid decisions he keeps making in order for him to still appear as a child. Saving Aunt may's life despite the fact she didn't want to be saved. selling his marriage to the devil. Not having life insurance, so if he dies in battle his loved have no way of taken care of themselves (obv before May got re-married)
It wouldn't be acceptable with other heroes, because other heroes are adults who got their acts together. They don't do the juvenile things peter does.
If Marvel wanted peter to grow up, then they wouldn't publish One More Day.