What if I told you..
..PD don't give a damn about simulating proper racing.
They could have made that in GT5 already, at least dual class LMP and GT but no, they prefer the "lame random mix".
What about old Jaguars running against SuperGT's? The most lame combination ever, and that's only the tip of the iceberg.
As long as you buy their stuff they won't bother offering anything more than you actually have.
If you want multiclass racing online go subscribe to Iracing, if you want to race offline go with rFactor's Enduracers mod and learn about rFactor. That's all, until Assetto Corsa release.
Keeping hopes up with PD is a lost cause. I believe it when I see it Kaz, for now I just LOL at you and at your lame all fruits mix.
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Slightly OT:
and this is what gpfan (a modder) is capable of:
That's for you Kaz, Nissan GT-R GT3 version.
We will have the this car in rFactor before Gran Turismo.
See ya.