As it is now, rerolling enchants is a costly and mostly fruitless endeavor.  I end up scrapping 2/3 of the items that I have attempted rerolls on.  The issue is when I'm rerolling an enchantment slot trying to get something useful to me and I get nothing but garbage enchants.  Are there no good enchants that can be rolled onto that slot or do the useful enchants just have a low chance of coming up?  

The problem is that I don't know!  I don't know if I'm completely wasting materials because that slot doesn't have a enchant that's useful to me or if I'm spending a huge amount of materials hoping to get that one good enchant eventually.

The result for me?  If a relic doesn't have at least 3 stats that I want on it, it gets salvaged.  There is no rerolling trying to make it into a great item because that's a waste of resources.  So it's back to grinding, hoping for that almost perfect drop.