The trouble with sex assault is often victim's wishes. In the past were they "assigning" all cases, even if the victims did not work to proceed and then exceptionally clearing them? Are they now only "assigning" them with victims who desire prosecution? Are they going to non-specialized detectives that work general crimes instead of the sex crimes people? I doubt they're just round filing all of them.
We had something of a scandal in my state a few years back over the "huge backlog" of unprocessed rape kits. The truth oh the matter was much more complicated and had more to do with victim wishes. A form was rolled out for victims to indicate how they wished to proceed and kits are routed based on that. Boom. "Backlog" issue fixed.
So I'm not saying the article isn't 100% as it sounds, but I see a lot of room for semantics.