The Word became flesh to dwell among us.
The flesh must become divine to dwell within God.
The miaphysites are correct. Jesus has to be of only one nature, a perfect fusion of divinity and humanity. Our aim is to become one with God and we cannot become completely one with God if our human and our (eventual) divine natures are separate. But, through our union with Christ we are conformed to his nature and so become human and (eventually) divine in one nature, capable of full inclusion within God.