You people make me chuckle.
Here's my opinion.
Throw in your quarter and leave it up to Fate.
Hell, we might die tomorrow.
Might as well screw around sometime, eh?
By the way, Fate sucks balls.
Just so you know.
Irony's not much better.
So there's not much use in such embyos, because you know something's gonna screw up. Side effects, people?
And on the whole improving humanity thing, I have one word for you:
Genocide.
Think 'bout it.