The loot filter is intended to tell the game what you do and don’t want to see on screen. What mine doesn’t do is all of the above. It is set to provide specific drops for “show” and the remainder as “hidden”. Instead what I see is every drop on screen with a few specific markers on a few drops as I’ll describe having small circles next to the left and right.
In addition I can’t seem to allow the Primalist to Dual Wield axes or swords while using the skill called “Harmony of Blades”.