The Organians seemed to get real mellowed out by the time Kirk and Kor battled over them in TOS: Errand of Mercy.
They didn't really seem to act like Organians to me. It felt more like the writers just grabbed a name at random without knowing anything about them. We never saw Ayelborne and his old college chums take over anyone's body.
And this was by Judith & Garfield Reeves-Stevens, they have sole writing credit, and they should have known better since they're my age.