The quality of the kids born from the embryos is largely indeterminable until they are born and begin to grow and mature, even though a grading system for quality of embryos exists. Quantity of milk produced by the surrogate mother is usually the only factor taken into serious consideration. However, many factors make up mothering ability and directly impact how that kid will grow out. Although it is true that goats rely on instinct to a significant degree, any serious observer of a dam and her kid soon realizes that each mother teaches her offspring many things that it needs to know in order to survive and thrive. Producers know how leisurely that dairy offspring get on their feet to nurse their mothers when first born and cleaned up.
Days pass before dairy kids really get up and move around on their long, somewhat unsteady legs.
Observe how a dam handles her newborn kid if she was taken from her mother at birth and bottle raised. The difference is profound. I am convinced that these behaviors and traits transfer to the kids and surface when they are old enough to become mothers. I have seen it occur. A kid born of an embryo flushed from its biological mother but raised by a surrogate dam will retain qualities from each female involved in its life.