I thought all that was meant by "tuned by Lotus" was that Lotus helped with the suspension and chassis.
And from what I understand, it was only because they were trying to make cars that were built strictly for comfort and luxury, to actually handle well also.
I know they did the Genesis that way. But I don't remember seeing anything about the Piazza.
What I do not understand, is how does what Lotus did in real life, alter any cars in game? Is 'tuned by Lotus' a new slang term for a certain suspension setting? I'm trying to get this, lol.