Correct me if I am reading this wrongly , but I deduct the following :
FAA could alone allow the return to service by September . so for US domestic use only.
EASA will need to perform its own re-certification process to allow it in EASA land, and that will take an extra few months.
Adding Synthetic airspeed could take 2 years and adding a 3rd mechanical AoA is really not feasible , and yet one of the two is required later by EASA ?
Yes lots to disagree on !