Why worry about feeding people at all? We could easily splice in sequences from plants so that we are fed by being outside for half an hour at mealtimes. Heck, we could engineer it so we don’t need sleep, and thus, effectively increase human productivity by 25-33% (lots of Americans get far less then 8 hours of sleep, that’s why I put the range in.)
I mean, if we want to take this to ridiculous levels.
Or, we could remain in the realm of actual probabilities. People will select the genes from both parents they like the best. “I would like her to have my wife’s nose.” Or “I would like him to have my husband’s chin.”
As far as appearances go, it’d be the same as plastic surgery, only much safer (no surgery, no anesthetics, no recovery, etc) and more realistic (if Mommy does not have DDD cups, Susie cannot either.)