...wait, having a caste system in a fictional society would be an actual issue?
Although I guess I've come across at least one thread with people getting angry over slavery in a fantasy setting, so it shouldn't surprise me.
The idea of the average reader being all 'hmmm I wanna read a story about a war but I don't want to come across any bad things' is also pretty laughable. Used to feel like the staff was pretty out of touch with reality before but this new virtue-signalling inspired crackdown isn't going to leave many stories left.
I've already heard that half the popular stories already published couldn't have been under the current rules, and their sequels are just getting grandfathered in while newer authors are just screwed.
Anyway, the basic premise sounds interesting and like it could go in a lot of directions, good luck with your writing.