That's a matter of down/up scaling armor making small tweaks so it sits on them properly, not completely redesigning the shape entirely.
For Viera, they'd have to add heels and then readjust the entire shape of foot armor to fit the form of their feet unless they just disable visual footwear altogether. In which case they'd have to modify leg armor to look decent without boots to cover up the bottom segments. Gloves would all need to be fingerless if they want to keep the claws. Which are also a defining trait.
