...the report will “absolve the top ranks of abusing their powers out of bias against President Trump...â€

Let's do a little fact inserting here.
Fact #1: Only those who are involved in Principal Review have seen the report, and they only get to see the section that pertains to them, only in a SCIF, and only after signing a non-disclosure agreement.
Leakers would be instantly identifiable and subject to criminal penalties.
Fact #2: IG Horowitz can only investigate employees still at the DOJ or Bureau.
They ran Comey, McCabe, Sztrok, etc, off long before. So the IG can't interview them.
But Barr, and much more importantly, John Durham can.
A month ago Durham announced an interview with John Brennan and Brennan went public and basically said "Obama made us do it".
This isn't over by a long shot.
Fact #3: Nothing at all from Durham's investigation has leaked.