I'm sure at least part of it will (need to) be unique, but I agree that it'd be neat for at least the limbs to connect to the unique torso setup via famiiar joints.
I don't mean to go on a rant, but...
[Narrator: lolololol]
I'm just frustrated that almost every time there's a new combiner, it's a new system. Just recently-ish we've had Combiner Wars, two different Devastators, Motormaster, and the 5mm system used by Volcanicus and the Fossilizers/Junkions/etc. (The latter system is great, but it doesn't scale up too well, and it's inconsistent on the limbs being pegs or ports.)
Now, if the combiners mixed things up more (side-by-side, robots forming entire upper bodies, or parts of limbs), fine, but they're all basically limb-robots and a torso.
(Or Menasor, which is a big robot with car-armor. I'm actually more forgiving of him because it's different.)