There is a conceptual misunderstanding in your question. positionX is to the same degree a "core" property as health or speed is. In fact, speed is nothing else than the length of the rate-of-change-vector of the position.
This conceptual wrong distinction leads to a bad design. The update logic and the render logic uses the same properties, i.e. position, rotation and even health. health can be rendered as a number above the pawn, there is no fundamental difference between those properties. Using MVC here is forcing a design pattern into data rather than the other way around, drawing a line where no such line exists.
How would you go about organizing this code into managable and separated blocks?
This data from your question:
int health
int speed
int weaponDamage
int positionX;
int positionY;
int positionZ;
int rotation;
simple belongs into 1 class. Don't over engineer, don't put unnecessary layers of complexity.