Probably not. So long as the time period for changing exceeds what most people would fly in a night, you should see similar reductions in the volatility of arena numbers.
If I had to guess, HTC used 12 hours before, and that worked. Six hours would probably work, but they weren't trying to experiment with a solution to the arena imbalances - they were implementing one that they knew worked based on previous experience.
Its all about the numbers. Everyone says start your own fight, its total BS. Tonight it was so fn boring I broke out with the bMuppets Bomber Wing... yeah it really happened, thing and I were figuring out how to use the bomb sights, and agent was discovering how to use the tail guns....
And you think I'm joking, I'm not.... and only after about 3 hours of this did some people finally up to fight, only to get upset that the vMuppets were part of a horde (I was in a heavy g14 at the time).... and it was true.. we couldn't switch and and when we attempt to start a fight, the dog pile occurs.
So the 12 hour time switch is a fail in my mind. Bombers were fun for the first flight, but not after the 3rd hour.
We would have loved to switched then fight the horde we created, but nope, not an option. Some say this was by design, some just want us to go to bed... who knows, but it blows.