i am not an expert there isn't much room for improvement maybe her biceps can get even bigger since i have seen some fbbs with insane looking biceps .but they are also a lot shorter than her so i am not sure if that matters. her calves maybe too. her thighs seem to be reaching the limits of what is possible .
Sometimes face filters make the head smaller too.
Assuming she's 233lbs right now. Lean, but not contest peeled, I estimate her maximum limit to be ~262lbs off season or 227lbs on stage. At her height, she would be well above the weight limit for IFBB Men's Classic Physique which is 182-187lbs.
Her muscle building potential is limited by physics. Her genetics could very likely continue past that maximum, if not for the limitations imposed by her frame and cellular regeneration constraints in humans.
Put 100 women on double whatever she's taking and we would not expect similar results.
Can't tell if it's due to the angles or editing of the video, but commenters noticed that Nataliya Kuznetsova looks more massive than ever:
How much bigger do you folks reckon she could get? What's her maximum limit?