You likely know more than any of us here in that regard. I would assume that once the prosecution is over, everything is fair game (except names of victims, especially if they were minors). But maybe that's wrong.

Nope, that's wrong.

For example, it's pretty likely that at least some of those 2.7 million pages of documents are Epstein's medical records - documents from his doctors, copies of prescriptions, health insurance forms, and the like. Those are all protected from disclosure by governmental agencies. They're absolutely free to introduce those records in a court proceeding of any kind...but they aren't free to just publish them for the heck of it.

Isn't there a legal thing where in discovery you just dump everything on opposing counsel? And hope they are so overwhelmed that they miss stuff?**

Sure, and they did that with Maxwell. Her lawyers filed to delay her trial because they dumped so much information on her. But they're allowed to do that in the context of a criminal trial, because the defendant is allowed to see every piece of paper and because what the defendant can do with every piece of paper is limited by the court's discovery orders. So Maxwell gets to see Epstein's medical records (for example) to determine if that's useful for her defense, but only for the purposes of her defense. She doesn't have the legal right to publish his medical records. Similarly, the government has the right (nay the obligation) to provide Maxwell with Epstein's medical records, even though they couldn't just decide to publish them - because again, they're used for the purpose of the criminal justice proceeding.

The government can't just publish all of Epstein's medical records and auto loan statements and Costco membership cards and such simply because it wants to.