The initial engineering evaluations are in. A Canadian blogger did the equivalent of an FOIA request to get them and posted a summary of them. The blogger says it is a bit too early to tell if and when it will result in the buffer cars being removed, but he sounds optimistic.
One piece of very good news is the cars passed the compression tests with flying colors. There are other issues, though, and I don’t have the background to even begin to assess how serious they are.
Here it is, I understand some of it, but far from all of it:
http://tracksidetreasure.blogspot.com/2023/04/testing-vias-hep-fleet-results-are-in.html?m=1