Good take on how to look at redactions when the report comes out.
“Don’t be quick to jump to the conclusion that redactions suggest that a coverup is happening. The better approach is to examine whether the redactions significantly impede understanding of Mueller’s conclusions or whether the report is still largely comprehensible. Redactions are far more concerning and suspicious if they are extensive and if they blot out conclusions than they are if they are sparse and merely remove evidentiary detail.
In his second letter to Congress, Barr laid out four different categories of likely redactions: grand jury material; sensitive material that may compromise intelligence community sources and methods if made public; material that could affect “other ongoing matters,” including investigations referred out from the special counsel’s office; and material that would “unduly infringe on the personal privacy and reputational interests of peripheral third parties.” Not all these categories are of comparable weight. Redaction of grand jury material is legally required, at least in the absence of a court order to the contrary—and Barr has said that he will not seek such an order as an initial matter. Redaction of material related to intelligence sources and methods is important and a legitimate concern for the intelligence community. Capacious redactions for the privacy of “peripheral third parties,” by contrast, should draw greater suspicion. Redactions to protect pending matters are exactly as defensible as they are proximately related to matters actually still pending.”
https://www.lawfareblog.com/memo-press-how-not-screw-mueller-report