I posted some of this in someone else's post, but I think it's a worthy idea to be up front so I don't want to risk it being lost or buried, and worthy of being explored more.
I have an idea for a new game play scenario: Make a scenario based on the more competitive playstyle for more "pro" players that limits all players to one fortress, period, and maybe even no walls. I prefer walls and multiple fortresses, as you can get creative and build really cool bases that way. But it's hardly to many players' liking. What's more is, having this scenario would be a great way on GameRanger, especially, to clarify with a specific name the kind of playstyle the server will use to all those out there who want to play a certain way, instead of having to endure unnecessary arguments, clarification issues in the lobby, or harassment from players who stigmatize you for using them. (Same with custom heroes....) I know the folks at the Edain mod have custom scenarios they've implemented quite nicely into the game mechanics, so I know it's feasible to do.
Is this something that would interest the devs of AOTR, though...?