You are implying the sluggish throttle is caused by vvt not enabling but we Don t know for sure yet without proof (= logs)
Also,
Are you pressing very slowly the accel pedal for 3 or 4 times with the ignition on and engine off before cranking the engine after reflash or DTC clearing?
It helps a lot
About learning, csg Mike Is right, Ltft learning plays a big role in engine smoothness and pedal response
In my tune i keep ltft disabled all the time and basically in less than 5 minutes of driving my pedal goes ok
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