Personally a weekly lockout in crafting in any form, even through things like "you get to craft this at 300% efficiency/production rate once per day" is disappointing. World of Warcraft did that ages ago and it was just bland.

Crafting for me (and a few people I know) is content that gives a lot of "freedom". It's something that people can just bury themselves in for days and weeks on like how real professional craftsman do. Now come and put a cap on it and tell a professional craftsman, okay, you may only work on this thing for 20 hours a week, and the only reaction would be "WTF?"