I would rather have a shardblade for a hand and then use some kind of half shard glove/sheath to cover it when not in use. This means I will be less likely to kill someone on accident, but now I have a sick arm blade like Wolverine or a Zealot.
Would you rather be cursed by the Nightwatcher to only be able to eat firemoss, or to have to constantly suck the light out of fresh spheres and also never eat food?