Credit goes to Yellow 26 on Gamespot board, I only took part in finding the translation.
This new system appears to be about your combat style in the mission. There is a bar called Ace Style Gauge that displays your characteristic. You can confirm what kind of pilot you are on mission debriefing screens.
When the pointer is on the left side of the gauge, you are being Mercenary Ace, who believes in only power and money. Mercenary Ace refers to a pilot who destroys everything and doesn't care whether the enemy is strong or weak. He always sticks to the reward and thinks about annihilating the enemy force. He is so menacing that he won't let the enemy pilot bail out. The writer of this article predicts the three conditions to become this type of ace. That is, to destoy the enemy targets of low threat, to give a final stroke to the enemy incapable of combat any more, and not to go to provide rescue for friendly forces.
When the pointer is on the right side of the gauge, you are being Knight Ace, who believes in pride and chivalry. Knight Ace refers to a pilot who goes fair even against the enemy and pays considerate attention to his wingman and
ally. He is assigned such a mission as to provide cover for defenseless transport planes. The writer of this article predicts the three conditions to become this type of ace. That is, to avoid destroying the enemy of low threat, to let go the enemy incapable of combat, and provide immediate support for friendly forces.
When the pointer is around the center of the gauge, you are being Soldier Ace, who fights as flexibly as the occasion
demands. He sticks to survival rather than a specific combat style. He shows off quality combat tactics and quite
effective maneuvers in accordance with battle situationsHe is a pilot who never fails to accomplish the mission and
always comes back from sorties in one piece. The writer of this article predicts the three conditions to become this type of ace. That is, to keep the pointer around the center of the gauge, to engage the enemy with different tactics, and to have rather high level flying ability.
Also, what kind of ace pilot you are changes radio chatter, missions, and the enemy ace squadron you meet and fight. Along with these, there is an in-game archive called "Assault Record". This is a database that provides the detail records of engagements with the enemy ace pilots. The number of enemy aces ammounts to over 150 this time around. This is a database which also includes the profile of the enemy and so on.
The other aircraft that turned out to be flyable are the A-10A ThunderBolt II and the MiG-21bis Fishbed.