Yes, combiners are partsformers, but the combiner team should at least transform into the limbs and the torso, what ZT do is just ridiculous imo... And just because they are pantsformer or torsoformers that alone doesn't make them stable, ZT Armageddon is a wobbly back heavy mess... I want to sell him so bad... My UT Ragnaros stands up better than him! Even if he is also a flawed combiner. Zeta's Superion seems to be the other way around though... But the whole torso being a separate piece (the "torso" bot is not even the torso anymore) just kills it for me... I think ZT won't venture into the movie verse... The figures are just too complex for them to design. As you said they focus on G1 style figures, even their engineering reminds me of the old G1 toys .