Giving bonuses like +1d3 is fairly useless though... I think that weaponssmiths should be able to make really powerful items by themselves, but everyone else should be limited to small unimportant bonuses, if they'd be able to do augmentation at all.
EDIT: Now that I think of it a bit more, it depends on the usual power of items if +1d3 is important... In ADOM it wouldn't mean much, but JADE might have a longer starting period with weaker PC and more mundane items.