Well they're important because they would actually prove that those things happened. If everything went down the way it supposedly did, they definitely should have found some indisputable evidence. Steve and Brendan couldn't possibly get rid of all signs of damning evidence if they actually raped and killed Halbach in his trailer.
There's a part of me that feels like Steve is guilty. Dude resembles John Wayne Gacy way too much to not at least seem suspicious and being accused of two crimes like this seems way too coincidental. On the other hand, I could definitely see him being completely innocent and actually being a pretty good guy. No matter what you, I, the people of Manitowoc county, or the hundreds of thousands of people who watched that documentary think, you can't put somebody away for life because of what you think happened. Most people who watched this are well aware of the evidence that was left out and none of it changes my mind even slightly. The state did not prove beyond a reasonable doubt that those two were guilty and I don't see how that's even debatable.
I don't think things went down exactly as the prosecution said they did. But there are many, many cases where the police and prosecution cannot find "indisputable" evidence. Most cases where guilt or innocence is completely indisputable don't go to trial. And a great defense lawyer will make almost anything disputable.
I would probably lean towards saying it wasn't proven beyond a reasonable doubt if I was on that jury. I disagree that it is not debatable - legal experts are absolutely debating that point, and many many people have been found guilty on significantly less evidence... including Avery himself in the previous case!