I think it would be very useful if it said something other than 0% (for example, 0.0001%).

If for no reason other than to help me know if there is an HQ version of the item I'm crafting or not. So 0% could be reserved for items with no HQ, and any other number for those with HQ.

(Unless, there is a guarantee of an HQ for every craftable item out there and I just don't realize it ^^;