I find it amusing that “the robots can feel emotions and feel them too strongly” became a legitimate failure mode despite the longstanding sci-fi trope that emotions separate man from machine (and machines were liable to fall apart while contemplating love or something like that).
Also, are the authors down on “near-zero emotional expression” because (1) that’s a difficult target to hit, (2) it would code for “indifference” which is not an attribute of the character we want AGI to play for emergent misalignment reasons, (3) the loss in value / legitimate use cases by purging emotions, or (4) something else?
After you figure out the eyes, I think you should work on making the functional robot hands retract at the wrist, and have claw-like hands emerge in their place, hypothetically speaking. The claws will need to be able to clink menacingly and repeatedly. You’ll want to test several different types of metal to get the clinking sound just right—more of a hammer on steel sound, less like wind chimes.