I posted a little idea in my blog a while back <3

Condensed version:

-Allow Primal loot to go into the loot list for a ONCE OFF ability to give to another (Inside the instance only)

-Introduce a feature where we can trade in unwanted Primal weapons to the designated NPC for totems/nuts or other needed items for future primals. The given amount of items will not equal to anymore then a third the cost to get a new weapon of the same type and higher costing weapons will never have a value more then the original.

Eg. Trade in Ifrit's Lance = 3 Inferno Totems OR 3 Kupo Nuts
Trade in Malignant Mogaxe = 3 Inferno Totems OR 6 Kupo Nuts

This way you can not hope to farm 'easier' primal weapons solely for trade in BUT it will keep the community interested in old primals (and helping those who want old primal items). The interest will remain because even if you do gain a Primal weapon you did not want, you can trade it in for a small amount of another primal's tokens.