> Some (many?) NASA engineers are at the high end of the band and are advocating a return on Dragon instead. Boeing is obviously at the low end of the band and thinks it is a low risk.

To me this gives a strong impression of history rhyming with itself. Back in the early 1980ies NASA engineers "close to the hardware" were raising warning, above warning about reliability issues of the shuttles, ultimately being overruled by management, leading to the Challenger disaster.

Then in 2003 again engineers were raising warnings about heat shield integrity being compromised from impacts with external tank insulation material. Again, management overruled them on the same bad reasoning, that if it did not cause problems in the past, it will not in the future. So instead of addressing the issue in a preventative action, the Columbia was lost on reentry.

Fool me once …, fool me twice …; I really hope the engineers will put their foot down on this and clearly and decisively overrule any mandate directed from management.