Actually, it is not that easy at all.
Different human bodies will react differently to certain G-forces. True, that on some (let's say 6g) most of pilots will be uncomfortable. But it is not that simple even in that case - effect accumulates, and have long effect, even if you are flying normally, already, you can still be readout/blackened for a while. It is confusing players.
And adding too much choises for MP isn't also good enough - imagine 16 different sessions with different settings and only 2-3 people in each.
I understand your reasons, of course.
Moreover, it were actually us who made this feature. And it is painful to know that the feature that was made, implemented, tested, polished and even presented to public already - isn't in the game now. There were reasons for it. Probably, not good enough for some of you - but we have to make choices all the time, a lot of them.
P.S. You probably don't know, but in October'08, our Arcade mode was much much more closer to current Realistic mode. And Realistic was a bit more close to current Simulation.
Focus tests showed, that average players are confused with that. And publisher even tried to force us to release game without 'Simulation' setting at all - but we insist on it.
Currently, Arcade is much more arcade, but Simulation is still very close to what it was. Yeah, there are no black-outs, and in Campaign (not in Single Missions) we have infinite ammo and fuel, and you can turn HUDs on (but you can turn them off, too), but it is still Simulation, with cockpit view, spins, stalls, flaps controls, no assists etc.
We had a fight with publisher to make flightstick support - they didn't care about it all, and were afraid that it slow down development and risk 1st parties Approvals (more TCRs for peripherial). We've worked directly with Saitek/Thrustmaster/MS to get all samples, and have done flightstick support on our own risk, to make sure the spirit of IL-2 will survive, and flighsim fans will be able to get pleasure from the game.
Yeah, currently everyone, including our publisher understand that it was right to do flighstick support/Simulation mode/etc. Flightsim fans are small audience, less than 2% of all gamers that will buy the game - but they are loyal, they build community, and more important, that is what the game is about - controlling the plane and fighting in the air, not simply arcade like Red Baron. It is also good, that we made Arcade settings more simple, they were right about it. If you look over previews, most of press (and they ARE hardcore players, not casual ones) still feel that even Arcade like it is flight simulation, and almost are not able to control plane in Simulation mode... So there is no just one side of the medal.
But please, do not explain me that absence of blackouts is ruining the game - that is a. not true, b. I know more about what can really ruin the game. You can just play the demo, anf not buy the game, if you really think so. It will be sad, though