I don't pretend to understand the details, but I think she's saying: Buzzfeed might have got some of it wrong, but probably not all of it. And they might have gotten it mostly correct, but Mueller's team felt the need to respond for complicated reasons.
The only thing that explains Carr issuing such an unprecedented statement is if Cohen’s ability to testify on the stand must be preserved.
Robert Mueller has the unenviable task of needing to sustain as much credibility for a bunch of serial liars as possible, starting with Michael Cohen. Buzzfeed’s story — whether generally true or erroneous on details about Trump Organization witnesses or totally wrong — threatened that effort.
And that’s why, I strongly suspect, Peter Carr finally publicly spoke.
Anyway, let's not jump to any conclusions that "this is one that will put Trump away". And it shouldn't be. There are plenty of established reasons Trump should be removed from office.