Although I was looking forward to seeing the LC F I agree with malcolmw the LC is plenty fast enough for road use. I also think that the market it was aimed at is probably more than catered for at the moment with German marques.
Not sure about the spoiler though, perhaps Lexus should just stick to the formula that works i.e. quirky cars like the RC F and LC, after all I still think the RCF Track Edition was a waste of time, just call it a Sport version. As I mentioned earlier for the price of the Track Edition you could buy a decent late secondhand RC F then do what I did some time ago if you really want to go on track buy a VX220 Turbo or Caterham you'll have much more fun. Plus for the £20K plus you've saved it will insure both cars and get you track day insurance for 10-12 trackdays a year for your choice of track day car.