It's in the doc man. Everything else that sounded new this season was already considered after season 1 (as conspiracy theories before she took the case) and has been in the news. Nothing groundbreaking here and unless she comes up with some hard evidence (after the fact) this is the end. If you haven't done anything but watch the documentary I suppose it might seem new, but it really isn't. It was truly not needed. If nothing else they should have put it off a couple years when they actually had something fresh, but this season will most likely do the opposite of what they hoped. If anything it made me think..well maybe he DID do it.
Weird, had the opposite effect. They should have held off and did S1 & 2 back to back, because having the time apart made me forget much of the precise details in season 1. I don't remember SA lawyers having too many experts in blood spatter, etc like KZ did, but S1 was fairly one sided for sure. I guess it doesn't help that Katz is kind of seem like a POS in real life though, does form bias to assume he's got an agenda and/or is lying.
All I can say was S1 I left the show thinking SA most likely did it with some doubt. But after S2, I was much less convinced, purely from the fact KZ raised reasonable doubt in MY mind. If the original trial took place after KZ did her thing and I was a juror, I wouldn't have been able to convict based on what she had come up with. Not to mention it's very likely Brandon had 0% involvement... now all you're left with is some questionable evidence, with no confessions from anybody.
I'd certainly be interested in a 3rd party non biased group to investigate and peer review KZ's claims & evidence. Not somebody for the state, or who KZ hires, or who's got gain one way or another. As viewers we have to take what we saw in S2 at face value unless we are actual experts ourselves (or unless we have a bias against SA otherwise).