Yeah. That would be nice. But you are more likely to get a "Grow up. Shut up and tow the party line." That seems to be the template used by McCain followers to woo support. Followed, of course, by the name calling. And McCain has given no indication he would do any such thing.
All true. Plus he'll probably name some Warmist ecotard like Pawlenty or Crist as his running mate; that won't help matters any.