Does no harm to get it done, either way you'll get peace of mind having it done & looks good if you ever sell the car as it was a fastidious (nerdy) owner
DSG oil is expensive enough, but from memory it does flow through a mechatronics unit so it wouldn't be a waste if it helped reduce strain on the mechatronics unit. I have a feeling that delayed oil changes are why the mechatronics have issues in the MQB platform.