Ace Combat 6 was on the precipice of falling into the pit most console developers suffer in adding arbitrary gameplay features. "It can be coded in and it looks cool, so it must have substance." Sure, it wasn't Sky Crawlers or Starfox style "Press-A or some arcane combo to win" but stuff like High-G maneuver, random lead pursuit missiles at arbitrary lead pursuit offsets, and allied assault (aka, fill your kill meter to make all friendly AI fire special weapons that they should be using indiscriminately) felt tacked on and not cohesive. I bet you the cinematic chases in Assault Horizon are just going to be quick time events whenever you happen to fight near skyscrapers. :\
I understand the problem most designers encounter when designing a flight combat game in that the gameplay can become quite monotonous. I just don't understand the bizarre gameplay constructs they force out in order to break the mold. Rail on console IL-2 all you want, at least Gaijin Entertainment went the high route and provided a pretty decent light sim instead of trying to produce an action game.