I don't understand how Yahtzee can go into a two-minute diatribe about exactly why Transformers fans are stupid mindless drones who can't see past their own nostalgia when he himself admits that he didn't know anything about Transformers. How can you be in any position to say what a franchise is and why fans are fools, when you admit you barely know anything about it? Very poor argument, and it comes across less like an actual point and more like unwarranted bitching about people liking something and you can't understand why, therefore you simply ascribe it to nostalgia and leave it at that.
Transformers has persisted since the '80s - contrary to popular perception, there hasn't been a time when Transformers has "gone away" like so many other '80s franchises - because there is something in the property that resonates. Not being able to understand what that is does not mean it's nostalgia and nothing else. If it was purely about selling toys, then it would've just gone the way of Dino-Riders, MASK and The Visionaries. Clearly there was something else at work here.
Transformers fiction started off as a way To Sell Toys to children. The series had rudimentary characters, but they were identifiable and memorable. It's a kid's show, after all. That doesn't mean it had to stay that way: with the G1 Marvel Comics and Beast Wars, Transformers started to add breadth and depth to their characters. They started to actually explain why they Transform, why they look humanoid despite being alien, why their vehicle modes have compartments that seem to serve no purpose save to hold human-sized beings, why the robots are at war in the first place. Sometimes the bad guys won, sometimes a Transformer would switch sides, sometimes the good guys would do bad things while the bad guys do good things, there would be lengthy character and story arcs, hi-SF concepts, musings on the nature of good and evil. Sure, it isn't Bester or Asimov, but it's better SF than most of the kid's SF that was around at the time.
I also find it kind of weird for Yahtzee to support the idea of humans in Transformers, since the Transformers are apparently impossible to relate to - this, despite most Transformers fans finding the robots the best thing about it, and the human characters largely superfluous and redundant. I find that sort of thinking really rather unimaginative, personally: by that logic, one would have to have a human character to "relate to" in any *franchise* that features non-humans as the primary characters. Kind of like how they had a white American male as the protagonist in Avatar: it's lazy and insulting, to assume the audience has no way of relating to anything that isn't just like them.
Also, Prime dying was a big thing. Name a kid's tv show of the '80s where the heroic main character - among many others - died ten minutes into the film. Not that many, right? This was a time when you couldn't actually use the word "death" or "kill" in kid's shows, and the Transformers film had the face of the entire franchise die - and he didn't come back at the end. Sure he came back *later* but that's like diminishing the death of Spock in Star Trek II because we have the benefit of hindsight.
The game sounds mostly like an exercise in fanservice for the TV show audience and some of the comic fans, and I think it does a disservice to the good Transformers fiction to simply go for the lowest common denominator. If WfC did a bad job of giving Yahtzee to care about Transformers, then that's a terrible shame, since there's a lot in the Transformers mythos worth ruminating over beyond Giant Robots Blowing Shit Up.