I read that slide that way, that even the new MCAS authority limits still may lead to cathastrophic failure (status late spring).
Therefore two more patches were developed. First some dual processor activation logic (probably status July/August) and then the cross channel monitor which by the name seems some state of health check between the FCCs and most likely is the fix for the bit flipping issue.
So the good guy has concerns that either not all loopholes have heen identified in the rush and DAL is still insufficient or that the changes are so significant that validation depth and robustness is questionable at best - both concerns I share.