Plane unlocks in single player - now more relevant than ever

[Ancient Seraph]

I agree with most of it, although I would hate to see that the planes will just be lying there for the taking. I mean, the planes that can be unlocked now through single-player, don't require a difficulty setting higher than arcade, and let's be fair, arcade is easy for most of us. The more valuable planes should be harder to achieve, say, certain Single Missions or Campaign Missions on realistic or even Simulator. This would exclude a certain part of the players, since some are unable or unwilling to complete those missions, but they can just use the online unlocks. These are not so much hard as time consuming. In no way should the planes be available as easily as 'Complete this mission'.