man, while i fully support speeding up the evolution through all the means possible, your statement is kind of self-contradictory: you use "normal", and thus implicitly you bring up the notion of some distribution with clear notion of "normal", ie. some well distinguishable significant mass at the center and thus the 'fix'/'enhance' difference becomes very well defined (not just merely one of perspective) - 'fix' is moving up toward the mean/center mass while 'enhance' is moving up toward the mass's upper edge and away from it.
At the lowest level it manifests as dating preferences - everyone prefers to breed with those they find mentally and physically attractive.
Direct genetic manipulation is just a stronger way of expressing those preferences.