Steve,
Wouldn't hurt to get a second opinion, IMHO, but I wouldn't wait too long on this. The ADR can subside more from what I have read in the past literature.
Please be careful. Just because it doesn't hurt doesn't mean it shouldn't be fixed.
I'm praying everything works out well and make them mindful in Germany about your financial situation. Unless of course you are independently wealthy.
You may be afraid of fusion but if this is what needs to be done with the subsidence, then you have to have it done.
You couldn't have predicted this complication so don't beat yourself up.
I was told before lumbar surgery I would probably get a post-operative ileus, where the bowel stops working, and I did that and then some, getting a prolonged ileus which necessitated 10 days in the hospital.
I wanted to leave but I had to stay.
I'm going to have surgery again and maybe it will happen and maybe not. That will not stop me from having a needed surgery.
I may be reaching, so cyber slap me if I am but I worry about you waiting. I don't remember anything about anyone keeping their subsidence. All I can recall is the person having to have surgery again to fix the problem.
I feel for you cause no one wants a complication.
You are strong and can do this.