I have the same vehicle. 143,000 kms. I bought it with 53,000 on it and it has had the same driveability issue since I've owned it. Turbo replaced, trans and transfer case (PTU) oil changed, most recent trans software update done. None of it helped driveability.
Thanks to this thread, I bought an EGR pressure feedback sensor and installed it today. Bought the complete assembly with the bracket, hoses and clamps, from the dealer. For the first time since owning it, my Edge is buck-free, no more lag, weird trans shifting etc.