I've been flying your product lately, online and off, and noticed that your model had G-induced loss of conciousness at 4.5 Gs. This number is *extremely* low and should be bumped up considerabley.
I have flow aerobatics and can tell you from personaly experience that at 5.0 Gs, rapid onset (square loop) and sustained, I had no tendancy to gray, and certainly no tendancy to tunnel, let alone black out completely, as you currently model. This is not to mean I wasn't "squeezing" fairly hard, I was. It's certainly required! Above this value, for my own personal G limit, it's a different story, but building up a G-tolerance is certainly a well know phenomenon. The Blue Angles do not wear G-suits during their performances, and I believe they get up into the high 6G range at times, and maybe even hitting 7Gs momentarily (I'm not sure about this.)
What you've modeled here appears to be fighter pilot who had never pulled any Gs in his life (not very likely), and never builds up G tolerance. You should at least give your players the benifit of the doubt and assume they are experienced, and have a least a "nominal" G tolerance, at least to 5.5 before the tunnel and blackout begin.
As it stands, this G-LOC modeling of yours detracts tremendously from the product, as it is not very close to reality.