Something that raises a red flag about QC is why the worst lots had such a wide distribution. I would expect for efficiency's sake that when manufacturing tens of millions of doses that are immanently going to be used, a finished lot would be packaged and shipped intact to the same distributor, meaning a bad lot should result in a pretty noticeable localized cluster of problems. For a lot to end up all over the place suggests intentional time and effort to split a lot up when distributing it to avoid noticeable clusters from a bad lot.

The idea that manufacturers are experimenting by varying the contents or dosage by lot seems iffy unless the manufacturers have a way to track what is going where and into whom. VAERS is too inconsistent to produce an accurate picture for the manufacturers to rely on. I find it much more plausible that there have been lots intentionally produced that are nothing but saline, intended for "special" people who either KNOW these jabs are dangerous or who would cause bad publicity if they came down with an AE.