Hopefully we'll advance while they're behind bars to the point where printable screens allow us to hang digital images on our walls, so we can print out GIFs of them crying and hang them in their bedrooms when they get back as a constant reminder of their behavior.
On the subject of the sentencing, I think a big part of it was also the doubt regarding how much the victim was aware of. Nobody, not even her friends, could agree on whether she "lied a lot" as one girl put it, or if it was likely that she may have been just drunk. Apparently even the victim told different stories to her friends, alternating between "I must have been drugged" and "I remember all of it." Regardless of which interpretation you support (with the extremes being "teenage girl roofied and dragged around as a rape trophy" vs. "teenage girl gets drunk and fucks a bunch of dudes, then cries rape"), it's enough to create a ton of doubt about the facts.