If it is not confirmed by a statistically significant difference between treatment and control, the blended/blinded data is meaningless. That is how you prove a drug works.
If the control cohort and treatment cohort both lived longer than expected, then nwbo is back to square zero.
Assuming PFS failed, the study is not a routine gold standard double blind, which is why critics are crying failure. However, the crossover placebo is still a comparison group. There should be enough elapsed time to see separation. I think the company must think they may have separation.
It’s still a challenging regulatory submission / strategy.