It is one line in the code that I don't think has to do with the upgrade, it is on google's side.
This extension has a lot of things in it that are unknowns and I am breaking them down slowly.
But they had 'model' where 'sku' should have been. When I changed that google started accepting my products. It will be tomorrow when google does another check against my products, to see if they get fully approved. But it is one step closer than it was yesterday.