I agree with pretty much everything suggested here. The only thing I'm unsure on is returning weekly Scrip caps. Certainly make scrips (especially the high tier) harder to get, it's a joke right now, but I dislike having a weekly cap since it limits your activities if you finish early. If I love crafting/gathering and want to go nuts all week, let me. Time limited mats that have an alternative but harder method to farm extra, like desynthing high end stuff, is fine with me.
I'm open to discussion on that though.
HW was indeed a love-hate thing and I know a lot of crafters who actually burnt out on it and quit entirely. I feel there's a middle ground there, where they can make it far more challenging but not painfully punishing. If we start saying "bring back HW" and they have data of a huge decline in crafters around that time, they won't take us seriously.
It does depend on your definition of "worth doing". Currently the only things you can really craft with Master Recipes are food, pots, the best crafted gear and the handful of Primal items and Map glam. Casuals crafters have everything else in the game. If crafting was a bit harder, the leveling sets would all be profitable. A large amount of furniture and glam is good profit, useful and accessible to the casual crafter too and there are plenty of craftable minions. Lots of mats are good profit.
A casual in ARR, HW or early SB could make tens of millions without too much time investment and buy anything, they just couldn't make as much as someone who dedicated countless hours to crafting. I don't see that as a bad thing.
There are arguments for moving food and pots down a tier. It's also debatable whether the next best gear in the game after Savage should be so accessible, since that invalidates a lot of raid/dungeon content. There are overmelded 480 sets everywhere. I think having the rare Primal items and Map glam hard to get for the tier is fine.