The blue set in HW (Ironworks) was the final crafting set and was part of the normal progression. At the same time they added in Carbonweave, a green set, that was between Ironworks and the prior set that was aimed at more casual crafters. Any serious crafter skipped Carbonweave and went right to Ironworks, though.

We probably won't be seeing a new crafted set. If we get upgrades, we might get something like the Thavnairian Rain used to upgrade the 350 gear, but I wouldn't hold your breath. With there being no new tier of raiding, there's no need to add a new ilvl of combat gear, which is usually what drives crafting difficulty.

Plus, progression was kind of silly this time anyways. I didn't enjoy getting only half a set and I hope they go back to HW's model of crafting upgrades as it just felt better overall.