[...] the characteristic hunched pose.[...]
I also see the same thing.
You might want to try standing hunched with shoulders forward, bend your legs, put your hips forward and tense your abdominals slightly.
How does that feel?
This is what feels characteristic to the original digimon and you seem to have missed it.
Characteristic like Einstein has characteristic hair.
Also, lizards have their legs slightly to the side and the original has them more bent (and looks like a more confident drawing that way).