I like that they're giving every craft a bullseye arc and taking away the special rules pertaining to it. Having effects that only trigger when you get someone in your bullseye rewards good flying, and might allow for some powerful effects to still exist, as long as they're tempered by the bullseye requirement.
I wonder if it'll work both ways, though. Will there be defensive effects that only take effect as long as you're outside your attacker's bullseye? So again, you could have a slightly more powerful effect, but your opponent can deny it to you by flying well enough?