the thing is steeper rake with the eventual intention of getting the rear suspension travel to be compressed more at high speeds than a shallow rake, during low speeds meaning rear ground clearance is still high, the entire floor is leveraged around the front wheel. this also means that at low speeds before the rear suspension is influenced by aerodynamics, a car with higher rake's front splitter/tea tray must also be higher to give clearance making way for when at high speeds the rake is reduced by a larger margin, the splitter would barely touch the ground. of course, then there is the front suspension too that will be compressed ...so the entire ground clearance and all of the cars mass is higher when rake is high
maybe this is also why the red bull racing cars scrape a lot harder at around top speed especially noticeable during qualifying, its a compromise they need to push harder
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