why use a lever when the throttle pedal oes the work just as well
the issue with the off throttle map is that it is not burning fuel the engine is infact runningg on fewer cylinders an blowing air over the valves ofthe cylinders that are not firing to aid cooling of the exhaust valves. thats the Renault system anyway. Its still hot air and the engine is being used as a pump to feed faster warm gases into the diffuser and keep its behaving consistently.
If they ban these infernal semi automatic gearboxes and have manuals with a clutch then perhaps we will see Senna type dancing on the throttle mid corner to keep gas flow up.