The AI Weapons that came out AFTER Excalibur are a lot better, Buzzed. Not to mention, they are also a lot EASIER to get a hold of. Exalibur involves camping one or two very specific rare-spawn mobs in the ShadowLands, and the QL range is something like 240-260...so it's certainly a higher lvl weapon.
Although, I always thought it would have been really cool to have one on Foe as a social equip weapon. Was not worth the cost of one, of course.
=Foe