There would still be plenty of grinding to do to try and get etheric light to upgrade old weapons and the new and old armors, but the weapons would have atleast helped those people to try and play PoE, ToO, and IB to give them a fighting chance.
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This is one of the most glaring flaws with this DLC. Even if you switched everything in your inventory over to HoW weapons/armor, you [i][b]still have to get Etheric Light to get anywhere...