To be honest, I liked your original torso idea. It was cool to think of him more as a combiner in the sense that he could combine with literally anyone, not that he was just forced to combine with certain characters forever. It adds a new flavor to him; making him the first combiner not by being five dudes, but by being someone who gave the ability for other Transformers to combine with him (and a few who also became torsos that he viewed as "worthy" or something). I think it actually serves his mythos a lot better. Plus, I'd just like getting a whole line of the Thirteen original Primes as deluxe or even voyager toys, regardless of how they're done. And yes, people resist change here, but it's the changes that usually add to a series' enjoyability. After all, if every series just copied G1, then there'd be no Beast Wars, Shattered Glass, ...Kiss Players... Okay, maybe not all of them were great, but at least they were different.