As I said, I was in such a fight before, with both phpBB.com and phpBBHacks.com actually actively censoring the other. Sometimes even on an administrator level; it was meaningless, childish and boring. I'd hope that people within this particular community are more adult and sensible than that. Fact of the matter remains, Xsplit exists, it existed before OBS did and it has a solid userbase. It's not something you can just ignore. Nor should people, having competition can actually be a good thing. Just think back to Microsoft during the 90s. Windows was so dominant, there simply was no relevant competition. The result? Windows was nowhere near as good as it could've been.
Having said that; a workaround for your particular challenge would obviously be to create a couple of batch files to do the renaming for you. I know, it's not the most elegant solution but it would work.