I still don't understand this proposal, HQ materials are pretty much there for low level crafters to have a easier time to craft a item that is way above their rank (any bonus to a HQ rate should be very little as it seems to be), at least that is how I am using it. HQ rates are already way easier than FFXI, rank cap in FFXIV is 50 and nobody is above rank 60 where HQ low level crafts was consistent in a craft and we are having HQ items for nearly any rank. I was never a crafter above 60 in FFXI but I understood the crafters that have reach 100 craft deserves the bonus of HQ. And I was paying extra for their devotions in the time they spend.
Crafting is already super easy in this game just more time consuming from having to spend 2 to 5 minutes in 1 craft (I never use HastyHand on crafts above my rank don't want to lose the materials).