Just from talking to the dudes who got picked up in FY16, I think PPLs and scores were the two biggest deciding factors last year by a long shot. I haven't seen the raw data you're talking about, but I would imagine it backs this up.
I was fortunate enough to grab a slot last year, even though I had plenty working against me. I was on an age ETP at about 32 years old and, honestly, outside of picking up DG out of the BUFF FTU, I felt like my bullets were pretty run of the mill for a rated guy. I was #1/3 out of the squadron and #2 out of 35 or so from the wing (I never saw the final strat, just heard the approximate numbers from the exec).
Where I shined, I think was that I had a PPL and my test scores. My AFOQT and PCSM scores both took a nose dive after I commissioned so I studied my ass of and retook both. Despite feeling like a douche taking the AFOQT as, you know, someone who already qualified as an officer, I walked out with a 97/98/94/96/82 and a 96 PCSM when all was said and done. I know for a fact there were guys out there with a better set of bullets and equal strats to me, so I'm pretty convinced the scores made a difference.
In short, definitely check your AFOQT and PCSM scores if you're thinking of applying (and retake if you can/need to) and go get a PPL if you don't have one. I honestly think those are the two biggest keys to success all things considered. Good luck bros, and if anyone needs help with the age ETP thing or needs anything else just hit me up.