the name of the insane trait has been changed in today's update

Here's a thought. Having an "insane" trait that implies a Sim who has a mental disorder, is about the same as having a "retarded" trait that implies a Sim has an intellectual disability. And we certainly won't ever have that. This is probably why it was changed.

(Edit: Yeah. The term is expectedly censored. But it's an old, crude term for a syndrome that used to be used rather freely when people were "joking around".)