I posted this to the bug tracker but a staff member said it would be more suitable for here.
It appears that Feid Rota can't swap the "...of Westfall" quest items. After respeccing, I'd like to go from the Staff of Westfall to the Tunic of Westfall, but when I talk to him, the only dialogue option he has is "Show more...". I've tried talking to him with it equipped, and with it in my inventory. I've tried deleting my WDB folder and disabling all my mods but nothing seems to work.
In the grand scheme of things it isn't a big deal, since it's a low-level quest, but it would be nice if he could do what he's supposed to in all cases.