I think it would be nice to add something to unfracture but add like 99 instability (annealing rune?). Just give you a second chance to craft but probably just blow up your item if you want to take the risk.
Came up with this because I fractured something at 98% and I’m bitter
I generally don’t like the idea of “repairing” an fractured item.
I personally would prefer crafts, that take risk before fracturing.
But i think your idea is probably the one, that i like the most of all ideas i have heard so far, since you literally will only be able to do one more craft, with very high cahnce for destructive fracture.
I just created a thread yesterday, to suggest some more ideas for runes and glpyhs, maybe you could add your idea there, so we have one big thread instead of having a single thread for one single suggestion.