The obnoxious thing is that the non-violence thing could have been totally passable if it was just "cannot cause direct physical harm to another being". It would have been simple and it would have worked within the context of the series (except for the final arc but WHAT is up with Erek and the Chee in general at the end I mean really). It definitely would have been a simplified, distilled version of pacifist morality, but it is a kid's series and it still brings up interesting conversations about the nature of free will.

Also, UGH THE HOLOGRAMS. I always tried to justify it to myself that the Chee had little personal force-fields that could be turned on and off at will, that they used to make their hologram more tangible, but...yeah, totally lazy writing. Ghostwriters dropped the ball on that one, I think, because IIRC it was never contradicted in the KA books, but ugh. The Chee got so massively convoluted and contradictory after #26.