So I have an idea of what players could do after they have completed the Ambrite Weapon collection. Once a player has finished the collection make it that any additional weapon they craft is no longer account bound and then could be sold on TP. After a player finishes the collection there are two problems that come up.
First, there’s no big reason to go to Dry Top except for Mawdrey or Living Story stuff. Since Living Story will always be there, it might be nice to have an incentive for players who have completed both Mawdrey and LS to still be there. This is true today with the Ambrite weapons, but after completion of those there is little reason to stay. After HoT, population should plummet unless HoT includes DTop somehow.
Second, if a player somehow gets another fossil somehow after collection completion, there is little reason to make a duplicate weapon since it is account bound. So if a player has extra Z-lockpicks, there’s little reason to use because if I get a second fossil it’s kinda useless. Same with PvP reward track, there’s little reason to keep doing that if the fossil is the end reward of the track.
I also think a problem may arise for those trying to complete the collection if DTop doesn’t have the players to push to higher tiers after HoT for acquiring the recipes, unless again there is some reason HoT has players still staying there.
So to address these problems here is my suggestion. After a player has completed the collection why not make it so that player can now craft the weapons no longer account bound. Any weapons they craft that is already unlocked in their wardrobe will not be account bound and then could be sold on TP. In order to do so, all 16 weapons would have to been crafted first and this would be simulating expertise as a crafter. This would open up a new niche that allows only those “experts” who have spent the time grinding geodes and fossils to now profit off of that achievement and help others who do not want to invest the time later in the games future to still acquire the collection. This would also give a reason for the players to have have a presence as they are searching during the sandstorms for additional fossils to use in crafting. Bottom line it adds another component to the game for players to do , make profit, and more importantly help newer players. It gives a reason for vets to teach the new players.
One big potential pitfall is that players who are not crafting the weapon set and bought it off the TP would then be able to craft the weapons themselves. I think the geode requirement for recipes would offset that, but in case that is not enough, then maybe the ability to craft weapons that are not account bound could then be tied to identified fossils somehow. That way it signifies the adventure aspect of searching for something, becoming an expert, and then using that “knowledge” to do something with it.
Of course, this model could then be applied to other collections for those “artisans” who have completed the rigorous requirements of their craft and then utilize it for other means so that it is not pointless anymore.
TL/DR: After a player has crafted the entire Ambrite weapon collection, make it so that any additional weapons they craft are not account bound and can be sold on TP. This opens up new niches for the player, gives a reason for vets to still go to Dry Top helping new players, choose the PvP reward track, profit, and adds to the endgame.