I'd recommend against going with some sort of reforging, if for no other reason than you'd have to come up with a plausable means to do so. Consider that even Warden's blades (which aren't even in the same weight class)
can't currently be produced because the one individual with the knowledge no longer has the capability to do so
. How much more of an issue would it be to reforge a holy relic in such a way that it doesn't become a (possibly still holy) lump of steel?
* The Armed Art stunt might be an option, though my take is that that stunt is really intended for use with small weapons.
* Retraining (shifting skill points from other skills to Weapons) is a solid option.
* Adding a stunt to the Sword that allows the wielder to use an alternate skill in place of Weapons ("All Training Is Equal Before God"?) is feasible, though it would certainly make the Sword more expensive.
* Or simply create a *new* IoP that fills a similar role but fits the character's fighting style better. Instead of using the Knight of the Cross option of the "Champion of God" template, the character would be a non-Knight Champion of God, or a True Believer with a non-sword Relic.