You do realize, that's how it works now? Limited crafting gear slots, and raiders get a special resource that allows ilvls up to 3 ilvls below heroic level (we have no confirmation on whether DF crafting goes to mythic, but that is honestly, irrelevant). In the end, the system stays a raider only system. Which, has been the major reason that crafting has stayed largely irrelevant; its only really for a minority of players.
Its a system they've had for years now and its always been bad. Its why WoW crafting is a joke compared to other MMO where you can make raid level gear without raiding. It keeps crafting relevant and usable by anyone and not just raiders.