BTRTN: What, Exactly, is at the "Heart" of the Special Counsel's Investigation?

Born to Run the Numbers is hearing mixed messages about the Mueller investigation. There are reports that it will be released imminently, but only last week The New York Times reported on an unredacted quote from Andrew Weissmann about "getting to the heart of the Special Counsel's investigation." What gives? Here's a theory:

http://www.borntorunthenumbers.com/2019/02/btrtn-what-exactly-is-heart-of-special.html

Excerpts: "Does The Times really think Mueller’s investigation has led to just 'a few hints' of collusion? For heaven’s sake, your own investigative reporters have exposed more than 'a few hints' on page one of your own paper. From where we sit, there appears to be more 'evidence of possible collusion' already sitting in plain sight than there are commercials for Trivago, golfers named Jason, Justin, Jordon, or Dustin, or even Democratic candidates for President. Geez, there’s probably a website called The Daily Collusion...
"Why wasn’t Weissmann’s comment redacted? It’s possible somebody goofed. But we doubt it. No, we suspect that Mueller wanted to make sure that everyone knows that conspiracy and collusion are still very much on the table. Particularly if he suspected that his soon-to-be-approved new boss has ideas of pressuring Mueller to bring his investigation to a rapid and premature conclusion. Perhaps the new Attorney General thinks that his best chance of saving Trump’s ass is to force the report into the public before Mr. Weissmann has actually gotten all the way to the 'heart.' Sure, we’ve been saying for a year that we’d love to see that report as soon as is humanly possible...for sake of the Constitution, the balance of power, the rule of law, and the United States of America. But now? Now we want to feel certain that Mr. Mueller and Mr. Weissman have all the time they need. Don’t be rushed. Do the job you’ve been asked to do, in exactly the way you think it should be done. Don’t let the new Attorney General force the issue.Take your time. Mr. Weissmann, go for it. Get to the heart of the matter."