My second cycle of applications I had 4 new letters of rec (more clinical and from new professors in my SMP), I also had a graduate GPA now (from said SMP) that was higher than my undergraduate, and I added 3 new activities on my AMCAS and did some major revisions to the old (I had everything proof-read, too, which I didn't do the first time). In addition, I re-wrote my personal statement.
The only thing I didn't improve was my MCAT score.
I think you need to show them that you have improved your application the second cycle around. Switch around your activites, add new ones, write new descriptions. New letters of rec will let them know that you are continuing to impress people professionally.
Overall just turn it up to 11.