Look NZBMatrix was bad for the community. No way around that. A lot of the DMCA takedown problems Usenet was having was specifically due to NZBMatrix. They knew it, and so did just about everyone else. But NZBMatrix isn’t the root problem. It’s the actual posts.
Newznab is the best way forward. It’s fairly easy to run, and you can get it set up in a single afternoon. Instead of having a few big NZB indexers, we’re starting to see smaller community projects. A single small Newznab site with only a few hundred users is much less of a target than a giant such as NZBMatrix.
Only, we could all have the most reliable indexers, and we could still be facing DMCA problems. I don’t think we’re quite at the point of being able to have community run Usenet servers. I wish we were, but even a low retention server would still be insanely expensive.
The big problem is the Usenet Providers themselves. US providers have to takedown posts, or they’ll become liable. No way around it. Would be better if they could drag their feet a bit. Or make the requester to jump through more hoops than simply emailing in the NZB.
At least more people are already moving towards the NL providers, but they aren’t 100% immune either. But we still have the posts themselves being the problem. Obfuscation isn’t a real answer, since that is bad for the community in general. It could be made to work, but more creative people than me will have to figure it out.