And why would it not be copied? Same Robo, none of the fuss. It's not necessarily taking away from anything, either. Because we only see one Robo, thus we associate ourselves with that Robo
You just mutilated the whole relation ship with Lucca and Robo. Lucca isn't a hussy whore skank bitch who is like "Well, if you die, i'll make myself another friend". Lucca is definetly not like that. She shows her caring side, and that all she wants to do is make machines safe for humans. She's not out to make copies of Robo, especially since she never had a chance to.
Besides, remember what Prometheus says. It's something like "Saaaave the fut...re................." or something.
And even Chronopolis had not yet cloned souls or anything, so how would Lucca go about it. Robo shows that he basically has a soul, and without the experiances, he wouldn't be who he is. I think using the real Robo as a thing to stop FATE would be very smart. Besides, if Belthasar fore saw all this, it means that he intended Lucca to be kindnapped and possibly killed, so I don't think she went into the future. Man, that'd be really fucked.