That pretty much sums up the entire product management of this game. A timed quest should not be nearly impossible for new worlds. Difficult on purpose doesn't mean 100s of products, that's just brainless setting 4 (or 9) jobs with drop clothes and logging off.* The Double trouble quest is IMO a mess. I read in the beta forum that you made it difficult on purpose, but this doesn't make sense. For example my adventurer (+ 10% / 20% product drop rate) on Juarez with fisherman set etc has a 56% drop rate for pick axes. Add some buffs to it it would still take ~45 hours to get 45 pickaxes. But since I played on this world a bit and already have 20 pickaxes...
=> The older the world the easier this quest is. In other words for many you didn't make it that difficult, you just screwed people on Kansas. Most there don't have fisherman set and / or the time farm that many items.
The only good part of that quest is that there is no reward that would make it worth to do it
* Minor issue: I don't get the point of the achievement. At least a small money reward would be good there. Just like for the crafting collections.
* Requiring high crafting skill products in timed requests on the new worlds is annoying. You lock out many players from taking part in the quests and in the fun of using their craftmanship.
Because you have to complete at least 120 hours of work to finish 2 quests, at least one of them requires you being online on a Saturday (of course a time constraint as well) So yes, finish a bunch of other quests that you haven't completed yet in order to complete a quest that is a timed holiday quest.WHY WON'T THEY LET ME IN THE OLD MINES!!