JMO
I agree with this and have been hoping they would do that very soon. I just dont see it harming the investigation hardly at all because they already released some video and some audio. So a few more tidbits from it may help break the case. Someone may get something from it that makes a light bulb light up for them.
I dont think LE will get false confessions from people because they would first have to somewhat look like the BG. And the odds of someone who wants to run and falsely confess to this crime and also happens to look like BG would have to be slim to none IMO.
I have always been surprised they are keeping the recordings secret.
Maybe it is down to the fact Abby is on that recording on the bridge (IMO) but we all know they died so people wont exactly be shocked if something horrible is on the recording.
Unless they dont have more recordings and its a bluff that backfired.