On a whole the AFA likes 2nd timers. I won't say they favor them, as much as I would say the 2nd timers have learned from their past and corrected their weaknesses, thus, they are more competitive.
Additionally, as it has been noted they can get that ROTC nom, which means one more slate to compete on. Plus, competitive areas for MOCs may give an edge to a 2nd timer, with that golden ticket of PRINCIPAL.
A lot goes into the equation, and nobody should take applying the 2nd time is a gimme. Remember everything matters. Plus, understand since you are now on a semester and not quarter grading cycle, that gpa is going to be your only shot. They will wait for the grades in Dec. to appt, but they may give an LOA prior to that time.
It is the same rollercoaster ride minus the DoDMERB, since that is good for 2 yrs.