I love the scene with Morgana’s doppleganger. It’s one of those moments that just makes this WIP even more of standout, and it’s not even one of the biggest or most attention grabbing scenes in the series 
The creation and inevitable death of a sentient being just to serve your own needs is an interesting moral dilemma. More commonly we see it in stories that are futuristic (often dystopian) with things like trying to create actual artificial intelligence in the form of robots meant to protect and serve humans. There’s a whole mess of moral complications there; people who think that it’s fine to destroy or kill any of the robots even if they have emotions and original thought because humans created them, they would not exist without us in the first place, etc. And the argument against that saying that just because we created them doesn’t mean we have the right to end them, like how we create children we are not allowed to just kill them if we want a newer model 
Or do we have the right to create a being that knows fear and pain and loss and that it’s existence is finite which is terrifying and force it’s short existence to be one of fear etc etc etc 
these are some argument that can be extended to the dopplegangers, (and a lot of other moral questions about creating AI/sentient beings that I won’t clog up the thread with ) and I like that we got to touch on them. Will the issue of the dopplegangers come up again later?
Also that kind of moral dilemma reminds me of the games Choice of Robots (obviously), Creatures Such as We, which is an amazing free game that’s all about considering various moral issues like that, and the WIP Sovereign Reality where you are transported into a videogame world that is crazily realistic only to find out that the “NPCs” are actually fully sentient beings with their own hopes and dreams and fears, and you’re expected to have to kill a lot of them in order to obtain a cash prize in the real world
I just love reading about moral dilemmas, and the games that bring these kinds of questions up add a lot more depth to their stories 