I too don't get what Kep sees in a man who got his a ss kicked in his home state by a circus clown, but we'll find out soon enough. Regardless of Marco's debating skills, I haven't often heard of an incumbent truly leading a race demanding 6 debates (essentially one a week from now to the end of Oct by the time they agree on dates and places). There's a small upside (you're winning but you may win by a little more) but a huge downside (you go robotic again and people realize you're small man trying to fill big shoes).
This would be akin to Portman or Grassley loudly calling for 6 debates with the opponents that they're up on in high single digits. I'm speculating Rubio has his hands on some internals that aren't good, as in most of the undecided are Dem leaners or something like that.