@LokiLeo789 After thinking about it for a while and reading your post with Termite I have come up with my mind on the topic:
Ilunabar had always dealt with the things called "sin" on quite a favorable way. The Phantasmagoria's main group of "geniuses" for example, had a lot to do with Sins. Grinder was a lazy gluton, Susa had the wanderlust, the Vascogne are the greedy trade people. Etc.
And let's not get started on Pride. And that is where the differences of view start, to quote the latest post. "But was any Pride truly good? It was called a Sin for a reason, he knew that oh so well"
In Illy's view yeah, Pride is quite good, and necessary, and like other feelings, shouldn't be eaten away and turning the person into puppets. She made sure Lifprasil wouldn't do that kind of stuff and was clearly bothered by his psych powers, it makes sense her reaction would be the same here.
I think this alone is a point of rivalry, and I think this makes sense In Character without the influence of my views on Xerxes OOC. (And sincerely, after reading Jvan's collab, it feels far more OK with the current tech than the "multiple harbors" thing of the other post)
So, unless you are clearly against it, some shenanigans might start happening on the borders of Amartía's influence.