I have look at all the other crafting weekly quests and I am a big gatherer too. The "Diamond Icon" for the Artificers crafting weekly quest is way out of line, compared to all other crafting weeklys, for time spent on gathering mats.
The main concern is the Jagged Lightstone x4. This is the breakdown in a perfect RNG world:
The Jagged Lightstone have a 50% drop rate from Lightspar Agate. Smooth Lightstone is the other gem that drops.
The Lightspar Agate has a 10% drop rate from gathering Orichalcum Ore. Every 10 ore I gather I get 1 Agate.
I need to farm 8 Lightspar Agate to get my 4 Jagged Lightstone.
I need to farm 80 Orichalcum Ore to get my 8 Lightspar Agate.
1-3 Orichalcum Ore ore can drop from a Orichalcum node. If I average it out to 2 Orichalcum Ore per node I need to find 40 Orichalcum nodes per week just to do my weekly.
I know of the 2-3 spawns that happen every 10 minutes. If ALL 3 happen to be up, and no one else is farming, then it still takes about 2 hours 10 mins of just farming Orichalcum Ore to get the 4 Jagged Lightstones for my crafting weekly. And this is with a perfect RNG.
These things are never in the AH because you can't farm them fast enough. I do like the rarity of the Smooth and Jagged Lightstones for crafting. But the Diamond Icon for the Artificer crafting weekly takes 5-10 times as long as other weekly crafting quests, and is the only quest that you can't go to the AH an buy all the mats due the the rarity of the stones.
This really needs to be addressed.
I have not looked into how long it take to farm the other gathered mat 8 Brilliant Diamonds from Carmintium Ore. This may be a big chunk of time too.