Seeing as there have been no currently announced changes to crafting, this includes new recipes, outside of housing items, I would say this essentially destroys Ilvl 70 crafted gear entirely. Crafters who make gear have been rather screwed for a while as the game offers plenty of alternatives to what you can make for much much cheaper. It may not always be the absolute best of the best, but to a vast majority that won't matter. It'll get them thru to allagan and af2 and that's all that it has to do.

I personally doubt we'll see any item level 80 recipes at all considering they seem to have announced every big upcoming addition with 2.1 and new gear was not mentioned at all. This being the case, sell off that potash and coke and what not while it still has worth because it and the gear it makes is about to become cheap cheap cheap.