What happen when HQ system change

I just curious that when the system change what will be happen to my current HQ item.
Is it some kind like this

NQ --> NQ
HQ +1 --> NQ
HQ +2 --> HQ
HQ +3 --> HQ

currently I have to stop crafting HQ item because I afraid that SE will down grade my item from HQ to NQ.

There are a few threads dedicated to that question
There is a translation form the JP forum where Yoshi says something to the tune of "+2 items are still up in the air as to whether they will be HQ or NQ"
so unless something has changed....