An interesting possibility for the Incendiary au is to show how Piltover canonically treats the people of Zaun depending on their circumstances. Most are ignored, but those who have something valuable are usually put in one of two categories. For people like Viktor who are seen as weak but useful, he is tolerated and given some respect because he isn’t a danger to the status quo yet. But for people like Jinx, Herald Viktor, and fire mage Vi, they’re seen as threats to be contained or stamped out unless they can be exploited. Because they’re a dangerous combination of powerful and unwilling to play by Piltover’s rules.
Could be interesting if the council only speaks to Jayce when they want to say something to Vi or Viktor because of fear.
Yeah, a very interesting and very plausible possibility.
You have the different ends of the spectrum (or as you said, categories) of where Zaunites tend to fall/be treated in Piltovian society. They are either "useful, but not threats to the status quo" or they are "threats to be stamped out and controlled".
I think it would be very likely that the Council only really cares about Jayce's opinion and what HE has to say, as opposed to even Viktor. Who is literally the other co-creator of Hextech, but he is also a Zaunite and that alone is enough to make him "less valuable" in the eyes of upper Piltovian society. He is still valuable, and therefore allowed to exist in Piltover because he does work for them, but that doesn't meant that they are going to treat him the same as they do Jayce.
Can literally see this represented with the scene of Mel and Jayce and Viktor in the labs looking at one of the bombs Jinx made. Mel and Jayce are towering over Viktor while they talk, granted that is because they are both standing up and he's sitting, but the visual meaning is there. And added with Mel tells Jayce "The decision is YOURS" only while looking at JAYCE. Not Viktor. Which can easily be read as her excluding him from the decision when it comes to what will be done with inventions that Viktor also helped to make.
There is also the thing of Piltovians, at least with what we see from enforcers, don't seem to view Zaunite children as children. We get several scenes, both brief and not-so brief, of enforcers treating children from Zaun as if they are dangerous criminals. The scene from the Enemy music video of them forcing a child Powder and a teenaged Vi against a fence. Them chasing and trying to grab the kids in the Arcade. Them being FULLY WILLING to throw a teenager into one of the worst prisons just because she's a Zaunite. And for all we know, no one even knew what Vi had done, but that doesn't matter. They were completely fine with throwing a child in a prison with adult prisoners who could very well hurt or even try to kill her due to prison violence and adult guards who see nothing wrong with beating her up. And she has no one to protect her or rely on, or anywhere to escape to. She is trapped in that prison with no way out.
And going back to Vi being brought to Jayce and Viktor, it would very likely lead to some kind of realization on Jayce's part about how differently they are treating Vi, even though she's a kid. While it is just as likely that Jayce has some kind of internalized prejudice against Zaun, we also see that he is perfectly willing to go into Zaun to buy from a store (Benzo's store) there. Now, this doesn't fully mean that he's completely without prejudice, but an important thing is people can unlearn prejudice. And having to see first-hand how the Council and the enforcers are treating Vi, it would be eye-opening.
You might think that "oh but he could just ignore all of that" but I don't think he would. If he is getting repeatedly slapped in the face with the awful treatment, I think that Jayce would start to rethink quite a few things. Even if Jayce does have some prejudice, he is not incapable of change and he is also not incapable of unlearning harmful beliefs or getting through his own naivety to see the more awful parts of his society. There is also that Jayce is a kind individual who does genuinely want to help people (even if he has a bit of an idealistic viewpoint of that), so he isn't a full-blown jerk.
And then, I'm sure that Viktor would kind of be resigned in a way to the reveal of how Vi has been treated. Or he isn't very surprised by it. He probably wasn't expecting Vi to be a child, but he isn't exactly shocked by how she was literally sedated and chained up. Which, probably would lead to him and Jayce having a few conservations about that and Viktor going "This is how Piltover treats us, Jayce. It's nothing new." and of course, Viktor isn't happy about it, but he isn't blind to the reality of how Piltover treats Zaunites. And that would just add to the very big slap of reality that keeps hitting Jayce over the head now.