[quote=Parser]
My issue with Bayformers is that it makes the mistake many of the cartoons made: It doesn't center things on giant robots beating the shit out of other giant robots, but instead focuses on some asshole nobody cares about (Sam Witwicky). Having some token human puttering around really detracts from the action; I'd rather that screentime be spent on either introducing additional Autobots and Decepticons, or developing the ones already there.Just putting that out there.
[/quote]

There's a long-held assumption in cinematic and TV circles that audiences need a character who is a 'point of reference', or someone they can 'identify' with. This is why there's often a kid character if the show is aimed at younger viewers, or a human cast member from a 'normal' background so they can ask the questions the audience (according to the studio execs, anyway) are thinking, and the protagonists can explain things to them - and the audience. 
This is why you get the human characters in transformers all the time - they're there to 'be the audience'. Even though most of the audience wishes they weren't there in the first place when you ask them.