Race drivers always seek for the duality of physics: He/she wants traction. And Rotation. A good front end and a good rear. The truth is: It's all always there, but what the driver is unhappy with is laptime and corner speed. Always. The Lexus then doesn't have the best of front ends, but it has good electronics that allow you do work the rear on throttle and work around the limitations of the front. At the same time its not a snappy or slidey rear, it just about bites into the tarmac, takes some excess load from the front and suddenly the car rotates nicely around the bends - while blasting that beautiful piece of a soon-to-be-history V8 that sounds even better off throttle than on it. 

The car generally feels better with fuel in the back and the quali delta isnt that large. You should recover some of the lack in qualifying in the race. Passing should be possible with the top speed, but beware of your longer braking distances.

Around here it almost feels as easy to drive as the McLaren - its just not as fast.

Electronics:
TC on 2 for Q and potentially 3 for the Race feels best for me as the car allows you to actually work with the rear on throttle
ABS on 6 seems predictable

Adjustments (you dont actually need any imo)

• stiffen front spring if front has too much bite for your taste (but reduce bumpstop range then, else you'll bottom out
• move BB forward if too loose into the last chicane. The weight transition is very tricky here and the rears easily lock up
• adjust rear ride height for over/understeer by 1mm steps
• Car might be faster with lower front ride height, but it will bottom out occasionally

Driving

• entry into the corners is crucial, try to live with minimal brake inputs to load the front up carefully. Give the front end time, don't throw it arround, it will easily exceed the grip limit and never come back. overall be careful and the car will turn.
• rotate car on throttle past the apex to pin it to the inside. Yet, don't overdo it as the TC will silently engage and stop all acceleration - not as good as the aston but still good in this car!
• aim for late apex in hairpins, try to trail deep, immediate but progressive throttle, no coasting in tight corners, patience in longer corners. early power is very crucial to work the diff and unload the front.

LFM:
Just reduce fuel load to 45/49L. Balance should become even more neutral. Adjust rear ride height +-1mm to your liking. Most likely up by 1mm for medium fuel loads.