Chiming in as one of the other Xenoblade 3 nominators (and requester): While the games are interconnected and some overlap exists in characters, they also all tell a self-contained story arc and most of each game's casts only exist in their own games. I'm presently exclusively interested in Xenoblade 3, for both requesting and offering, and I'd like to be able to guarantee matching accordingly. Maybe the specific tags already take care of that? You have more experience with nominating and matching on ao3 than I do, but I wanted to bring up my concern ahead of time in case I don't see your question next year.