Sorry TheBug, you posted while I was, so I may have put my own twist on the thread. As I see it now you are asking what is the difference between your setups and the "old AvA"? That is a good question.
Well, I think it is just a matter of what kind of reward is in it for the average Aces High player. In the MA, we have 3 countries, every available plane, and a perk award system. Squads flock towards the MA to compete for stats, the same with individuals ( so much so that on occasion cheats have been discovered -- although not the norm ).
Before the invention of the Dueling Arena Furballing area, the AvA was the best relaxing atmosphere to just sharpen your skills and get into some excellent fights. Most anytime of day that I want I can do that now in the DA. The only difference being, that at some point in time some dweeb will up a jet, tempest, or bomber and the dogfight at some point becomes ridiculous (sometimes I r teh dweeb).
My advice is to give the setups time between to really get out and promote it's arrival. Build up anticipation and understanding of what planesets and AvA expectations there will be. In the meantime, unleash the hounds and maybe allow Mid War aircraft (NO JETS) to compete with the DA furballers.
(Hoping I am making sense -- sleep deprived)