It was going to happen regardless. The earliest draft with Optimus's death, Hot Rod wasn't involved. It was done only to create a different leader in Rodimus Prime.
Originally Posted by DeadXMan
Again, watch those episodes. The humans did a lot that was on par with the movies. Especially "Super God Masterforce", where humans were controlling the Transformer bodies. That there alone puts it on par with the films.
Originally Posted by Sighphi
The reason humans have more face time is that it's too expensive to have the Transformers on screen, in robot mode all the time. And seeing that the story takes place on Earth, it only makes sense for humans to be that involved.