Hey flame_elchemist—sorry for the lack of clarity on this. We'll have to think about a way to clarify this in-game. Unique items would be ones you got as rewards from bosses, quests, or found in unique locations (such as display cases)—basically anything that isn't random loot or bought at a store. In the list you provided, the Masterforged Warhammer, Lord Adrianus' Amulet, Ring of Occlusion, Master Alchemist's Ring, and the Armor of Alonso Madranus. Sorry, that sounds like the majority of your gear.

And come to think of it, we should probably make an exception for the Ring of Occlusion. Hmm. Anyway I'll think about maybe making a way for the game to inform you which equipped items can't be transferred. Sorry again!

They can be in your inventory, they just can't be equipped. I'd hate to auto-clear them because then you could wind up starting the game with no weapons or armor, and that would be unpleasant for you...

Oh—well, I'm glad to hear that. Because of any unique items, it seems appropriate to let players keep that one. Plus since it can only be worn by the Hero of Farhaven, we don't have to worry about you equipping your party with a bunch of duplicates...

Now I need to figure out how it slipped through the cracks, though, lol

I think the person who got to keep the Ring of Oclusion was lucky.
I wanted to keep it too for my New Game Plus, but had no such luck.
I could not proceed with the ring equipped and had to unequip  it.