Fox-3!

Leaving unguided rockets behind, the aircraft are now equipped with air-to-air fire-and-forget active homing missiles! This makes combat a lot easier and a lot more challenging at the same time. It also allows for more interesting engagements, allowing possible high-off-boresight launches and forcing the employment of missile evasion techniques. Given enough energy, you can also launch some long-distance attacks, avoiding dogfights altogether, more like modern aircraft.