[Ronaldus Magnus]

"The demand that defective people be prevented from propagating equally defective offspring. . . represents the most humane act of mankind."

Adolf Hitler, Mein Kampf

[Little Ray]

Just 'cause Hitler endorsed an idea shouldn't automatically discredit it. For instance, Volkswagens and autobahns were pretty good ideas. (On the other hand, the Maus was pretty stupid, as was the Sturmvoegel.)

The person(s) paying for the upgrade or modfications would get to decide what is an improvement. Some are improvements seem obvious, and others might be more subtle - I'd would be more worried about the QA process myself. The ultimate process of selection would be the achievements of the "improved type." You don't think there would be just one standard do you?