a code phrase that activates a mind control chip that causes them to turn on the Jedi. They won't even get to question an unlawful order (as we see clones do previously) - I found it particularly brutal that they all start repeating the phrase "good soldiers follow orders".

That sounds devastating; thank you for the context. (I tapped out after the second of the prequel films and had not seen the scene in question, either.) I take it the Bad Batch are immune to the mind control or otherwise able to resist it, therefore any narrative that follows them dodges most of the horror that happened to more or less literally everyone else they knew and worked with?