I guess the big question is, when the level cap is raised, will we have new class quests - leading to new mainhands (perhaps better than I75 Supra's)?
Also will there be lvl 60 recipes for Weaver and Leatherworker to let them make new "class sets" - a new set of lvl 60 1 star recipes?

From a developer's perspective, someone who picks up the game after the expansion, will likely not "want" to go through all of the grinding required to obtain the current crafting gear.
Unless they either nerf the requirements (amount of items to turn in and mats requires), or the lvl 60 crafting gear enables people to simply skip the 50x token grinds, for instance.