Not a lawyer, but I come from a family/circle very versed in law, my father's best friend is currently a judge, one of my mother's best friends is a former D.A. and practices currently, and I used to watch children for a public defender with over 25 years experience. All are huge UT fans, two are UT grads even and one a former UT football player, and this case has been something that I actually asked them about extensively when it started up (especially being in college and at UT it's good to know your rights/worries/etc. with parties and what is considered a crime or not these days)
They all essentially said the same thing. With a case like this that is high on emotions and very time sensitive evidence, the longer it lasts the better it is for the defendant. It has nothing to do with innocence or guilt, but the fact they didn't have very concrete evidence when it first happened one way or the other, the fact they have interviewed so many people, and the fact it keeps getting pushed back (regardless of reasons, if a D.A. or a court truly wants to see a case they will 100% make it happen), the better it is for A.J. as far as this reaching a level of reasonable guilt.
Naturally, none of us were there and nobody outside of the people involved will ever know what truly happened that night, and at this stage with it having been over a year ago even the people involved remember it differently than it truly happened, so there is no use defending one side or the other. However, the longer this goes on, the more likely it becomes they don't have enough evidence, and my off handed informed opinion is that A.J. will probably be found not guilty based on the way the courts are acting with it.
This is of course not counting if the D.A. offers a plea of some kind, because sometimes a plea of something smaller that can be taken right now and expunged at a later date is far more enticing than being found not guilty after having racked up a mortgage in lawyer and court fees, which a high profile case of this would most certainly accrue.