This is the dumbest cop out argument. It's not about G1... It's about changing the spirit and flavor of established characters. It's not that Optimus kills... It's his bloodlust and willingness to do so. Movie 1 Prime was Optimus Prime. He dispatched Bonecrusher quickly and without delivering 80s action movie one liners. He seemed to have ability to kill, but not the desire to do so. The cartoon may not have allowed violence, but when given his badass moment in TFTM, he killed noone. Either way, ROTF and DOTM Prime where more along the lines of Big Convoy or Grimlock, strong warfare minded killers. The main appeal of Prime is his pacifist ways and desire for peace. Movie Prime doesn't appear to have any regret of killing, and even seems to enjoy doing it. Not only that, but honestly, they went too far with the robo gore in the movies with the spine ripping, face peels, heart ripping... Ops has always had the feel that if he kills, he does so without extreme brutality. Making the symbol of peace in Transformers into the most bloodthirsty robotic warrior is even worse when the villains aren't given any kills like that. It makes Prime look like a bully. I'd rather they make Prime kill, but do so as if it's not a task he enjoys, and leave the brutality for the villains.