You are right about the need for having default indicators too on the authority side. That would be welcome too.

But in this specific case (when we change authority type in a merge) we need as a fallback the default indicators of the biblio record. ( As you explained on bug 14769, we cannot trust the indicators from the authority record. Since the indicators on a 100 authority cannot be used on a 600 biblio field etc. -- Who invented those rules, should be rewarded ;)

In the code we now copy the old biblio field indicators into the new biblio field, and these may be similarly wrong for another biblio field. So I would like to fallback to the default indicators of that new biblio field; they may still be wrong too, but better than nothing. Choosing between two bicycles, while you want a car.

That said, this is advanced authority merging. I would normally not recommend changing type. It should be an exception. So probably we can consider this as minor issue.

Thanks for your feedback,

Marcel