We’ve run in to an issue with child products inheriting attributes from a parent product.
First Scenario - Works 
When we create a child product manually by clicking on the + icon from the Child Products relationship tab of a product, all of the attributes from the parent product are inherited to the child product, as expected.
Second Scenario - Does not work 
When we create a child product through an Import Feed by specifying the Parent Product, the attribute values are not linked. We have to either manually go to each attribute and click on the link icon or select the “Inherit all from parent” option from the Edit split button.
I am sure that we are just doing something wrong. I was looking for an option on the Import Feed to inherit the parent attribute values, but I didn’t see anything. Has anyone else ever dealt with this issue?