All that stuff that people call 'fluff' is, actually, rules.
If you remove that from the game it ends up being a very lengthy and poorly thought out cooperative combat game.
A board game would make for a much better implementation of such a game.
I'll ask you a question I asked someone else who seemed to be taking a similar position, then:
I allow the Order Domain in my setting/campaigns, but I call it the Command Domain, because I think that better reflects what it does. I probably changed the names of the Domain abilities here and there to reflect the domain name I'm using. It's the only version of this Domain I've ever allowed in this setting.
Am I understanding you to be saying that I have substantially altered the domain, here? All I've done is change the name/s, what I would call "fluff." It seems to me that you're calling the name of something is a rule, whereas I think of it as, well, a name for a rule, and the rule is the same with a different name (that which we call a rose etc etc).