I could see 476s that took a BoP material limited by daily cooldowns like they did with inscription trinkets, that'd cap you at crafting one weapon every 5-10 days depending on the type, but that's all I'd expect.
It'd just be more crafted gear that fell into the category of being too weak and too expensive to be worth it. And if they added powerful BoP items it'd make the profession too overpowered for particular classes.
The real game change would to the chance at proccing rare items and possibly even epic items (they are specialists in their fields after all). So armorsmiths would have a chance when crafting plate of getting the 415 gear, weaponsmiths wouldn't but they could possible make a 476 epic weapon. Tribal LW would get the bonus on leather items while dragonscale LW would get it on mail gear.
Tailors would be a little tricker, but perhaps there could be a spellcloth specialization for armor and a bag specialization that reduces the cost of Royal Satchels by 2 cloth (20%)
That was one of several suggestions I made in this thread (http://us.battle.net/wow/en/forum/topic/7004697825) offering suggestions for how BS could be improved.
There's so much potential in professions that is not being realized right now.
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