Have your tried with a Debuff All potion? I have not, but that is the only kind of debuffing arrow that I have found in the game, so it might work. Debuff All potions can supposedly be made by combining any 2 debuff potions.
Anyway, it does seem like a stupid thing to take out, but then again those particular arrows are the least useful anyway. Annoying when your characters get hit and can't equip their gear, but that hardly ever (if ever) worked the other way around.
Last edited by Sotanaht; 04/11/15 03:42 PM.