I'll say it again, since only AkAk noticed it the first time around.
Re-invent the dueling ladder. Award the monthly winner a free month of subscription. It wouldn't reward some of the dweebiness that the current scoring system rewards. And it might encourage some folks to really put some effort into learning how to fight more effectively.
As a matter of fact, if I were HiTech, I would award a free month to the top three maybe... Or maybe the top duelist in category. Have three categories... Unlimited, which includes any plane in the set, regardless of eny. Then maybe 11eny and higher. And a 21eny and higher. A high ENY plane can be used in any category. But lower ENY craft must fit into the category. Heck, add a Bomber category for dogfighting with 4 engined bombers.
Maybe make a rule that a pilot may only win a category once every three months. And never more then one category.
Just some ideas.