Trills IMHO
"If a bog-standard synth is not currently conscious, is there a moral imperative to make it be so?" No.
"...is it just an object right now, so we should only make it be conscious if we think doing so will make the world a better place for the currently-conscious inhabitants?" Yes and Yes, and I would see it as fatal to the human race to do so. It's the usual futuristic doom thing, just a bit more thoughtful.
But when 'arguing' with automated messages on the phone I do sometimes wonder - who is in charge here!
Em "as the reason for creating the originals was never financial, unlike the later ones, which were created solely to perform simple tasks for less cost than humans, e.g. like Hester." Do we know the original reason they were made had no financial connection?
Personally, I think Esther cannot feel empathy, she is a sociopath or whatever, but others, like Odi are very interested in others. I think they are all individual just like people.
EM WWe know how Leo got his body" His body is human, it's his mind that is synth, created by his memories.
"I do wonder how the female scientist planned to "embody" her creation, or how the seraph children got theirs - now that seems a bit creepy." it is very creepy because if the nasty guy who is Athena's boss got to do his evil idea he could implant V in 100 'children' how could Athena cope with that. I think as an idea human brain in synth body works better than synth brain in a human body.