I'm with you re modern AUs. I generally need to explore enough of the canon setting based stories before I can get to complete AUs. I've read a couple of them for Witcher but my overwhelming preferences is still for the canon setting. Your idea sounds intriguing indeed, especially if attitudes to Witchers have changed, and if time has made Geralt&co into full on legends... or, alternatively, completely forgotten them in the annals of history...