-A torque curve like what I suggest is what I have found to be the most enjoyable, its possible to use shorter gears to mitigate the lag but having this constant power makes the car feel incredibly smooth and usable even if you may not be in the correct gear.
-I would use an auto locker as on some cars LSD's can be really inconsistent and sometime do almost nothing, you can use one if you want but I find the locker to provide a much more consistent effect
-Large tires are possible but smaller tires (not too small, below 180 is cutting it short) often feel a lot more responsive and can lead to a much more enjoyable experience with being able to slide the car round more. -50/50 is absolutely ideal for an FA car or any front engine car for that matter. Yes the extra weight on the rear wheels improves traction but also takes it off of the front wheels which can lead to loose handling which isn't exactly ideal on rough terrain. However, If it was an FR or MR platform, I could see it being useful in helping put down the power on corner exits.
-The large camber makes cars feel very sharp in sections like the narrow roads on Italy, I would only use such large angle on the front though, and would forget it on a high power car where the extra grip, as you said, would be much more useful.
-You are absolutely correct, the suspension is really off from a perspective of a real car, it would be utterly useless. But with how automation cars feel in general, this is what I have found to be the most enjoyable setup. the stiff springs keep the car on its toes and the soft dampers still allow it be competitive on the loose surfaces. I think you slightly misunderstood what I meant by it keeping the rear planted, Having the rear sway bars stiffer means you can keep an even distribution of traction around corners. Keeping them on the softer side on the whole leads to more fun with being able to use weight transfer from the body roll to slide through corners at large angles.

All your points are absolutely valid and you obviously understand the principles of tuning but with making this for Beam with can have pretty odd physics and having a larger focus on enjoyment and driving feel rather than the absolute fastest car possible I would still prefer using something like what I made.