There was a WWI arena in Air Warrior.  It was always almost empty.  I didn't like WWI.  The problem is that you have no forward-up view.  To get a taste for what it's like, map your forward-up view keys (or hat or whatever you use) to straight down (so you are looking at your cockpit floor -- i.e., no view).  Then go try some stallfights, where your most-used view is forward-up.  That's what it's like.