If that "hesitation' disappear when you stop pressing the pedal and then press it again, it might just be a high tension on MAF compared to Revs ( Limp Mode) which drives the ECU to cut fuel to protect your motor. This sometimes happen when you block your EGR.So a fast update today... i am still getting a hesitation at 2000rpms
What you can do is get a voltmeter connected to the MAF signal at its input on the ECU.
If the tension exceeds by just a little, 3.55V below 2OOORPM, you get a limp. It is not a faulty MAF, but more probably an excess of air coming through.
To suppress : screw the adjustable screw behind the actuator, which limits the closure of the VNT, and set the turbo spool-up OR, add a diode or two in serie on that MAF signal to decrease its tension.